diff --git a/media/css/file_view_extra.css b/media/css/file_view_extra.css
index 8b0fe55fb4..7151894aa9 100644
--- a/media/css/file_view_extra.css
+++ b/media/css/file_view_extra.css
@@ -9,8 +9,7 @@
 #view-hd,
 #shared-file-view-hd,
 #view-path-op,
-#file-op,
-#sf-commit-op {
+#file-op {
     width:950px;
     margin:0 auto;
 }
@@ -44,7 +43,6 @@
     border:1px solid #ededed;
     margin-top:12px;
 }
-#sf,
 #md-view,
 .CodeMirror,
 #file-view-tip {
@@ -52,7 +50,6 @@
     margin:0 auto;
     box-shadow:0 0 6px #ccc;
 }
-#sf,
 #md-view {
     min-height:400px;
 }
diff --git a/media/css/seahub.css b/media/css/seahub.css
index 183e4cb0f3..d5e7ef3b59 100644
--- a/media/css/seahub.css
+++ b/media/css/seahub.css
@@ -1085,7 +1085,6 @@ textarea:-moz-placeholder {/* for FF */
 .article p {
     margin:0.8em 0;
 }
-#md-edit-help ul,
 .article ul {
     list-style-type:disc;
     padding-left:2em;
@@ -1408,8 +1407,7 @@ textarea:-moz-placeholder {/* for FF */
 #notice-popup a {
     font-weight:normal;
 }
-#notice-popup .close,
-#discuss-to-group .close {
+#notice-popup .close {
     position:absolute;
     top:.5em;
     right:10px;
@@ -1482,15 +1480,13 @@ textarea:-moz-placeholder {/* for FF */
     white-space:nowrap;
     z-index:10; /* for shared dir grid view */
 }
-#lang-context-selector a,
-#to-group a {
+#lang-context-selector a {
     color:#000;
     display:block;
     padding:1px 5px;
     font-weight:normal;
 }
-#lang-context-selector a:hover,
-#to-group a:hover {
+#lang-context-selector a:hover {
     background:#eee;
     text-decoration:none;
 }
@@ -1619,22 +1615,6 @@ textarea:-moz-placeholder {/* for FF */
     margin:3px 0 0;
 }
 /*myhome*/
-.home-profile .pic {
-    margin-left:9px;
-}
-.home-profile .txt {
-    width:135px;
-}
-.home-profile .a {
-    font-weight:normal;
-    color:#999;
-    font-size:12px;
-    display:inline-block;
-    margin-top:5px;
-}
-.home-profile .a:hover {
-    color:#333;
-}
 #quota-bar {
     display:block;
     height:1em;
@@ -1673,16 +1653,14 @@ textarea:-moz-placeholder {/* for FF */
 #repo-create-form .checkbox-label { /* for "Encrypt" */
     margin:10px 0 0;
 }
-.activity-group-hd,
-.event-group-hd {
+.activity-group-hd {
     padding: 8px;
     color: #444;
     font-size:16px;
     border-bottom: 1px solid #e5e5e5;
     margin:0;
 }
-.activity-group-bd,
-.event-group-bd {
+.activity-group-bd {
     list-style-type: none;
     font-size:15px;
     line-height:21px;
@@ -1740,8 +1718,7 @@ textarea:-moz-placeholder {/* for FF */
     margin-top: -20px;
 }
 /* avatar */
-.avatar-op .avatar,
-.home-profile .avatar {
+.avatar-op .avatar {
 	border-radius: 4px;
 	-moz-border-radius: 4px;
 }
@@ -1929,15 +1906,7 @@ textarea:-moz-placeholder {/* for FF */
     display:inline;
     margin-right:5px;
 }
-.displayed-op .dir-download,
-.displayed-op .file-download {
-    margin-right:5px;
-}
-.displayed-op .op:hover {
-    text-decoration:none;
-}
-.audit-item .audit-select-hidden,
-.repo-file-list .hidden-op {
+.audit-item .audit-select-hidden {
     position:absolute;
     background:#fff;
     padding:6px 1px;
@@ -1945,14 +1914,10 @@ textarea:-moz-placeholder {/* for FF */
     border-radius:5px;
     z-index:10;
 }
-.audit-select-hidden li a,
-.hidden-op a {
+.audit-select-hidden li a {
     display:block;
     padding:0 12px;
 }
-.hidden-op a:hover {
-    background: #eee;
-}
 .file-choose-form {
     width:500px;
     padding:10px 20px;
@@ -2019,18 +1984,6 @@ textarea:-moz-placeholder {/* for FF */
     color:#666;
     margin-left:5px;
 }
-#dirents-op {
-    position:fixed;
-}
-#dirents-op .op-icon-btn {
-    display:block;
-    margin-bottom:6px;
-}
-#dirents-op .op-icon-btn .icon-trash {
-    display:inline-block;
-    width:14px;
-    text-align:center;
-}
 .lsch,
 .lsch-encrypted,
 .file-diff {
@@ -2287,12 +2240,6 @@ textarea:-moz-placeholder {/* for FF */
 #repo-transfer-form .op-target {
     max-width:200px;
 }
-/* group-join-form */
-/* group-join-form */
-#id_group_join_msg {
-    width:260px;
-    height:80px;
-}
 /* group, org */
 .user-list {
     margin-top:30px;
@@ -2322,29 +2269,11 @@ textarea:-moz-placeholder {/* for FF */
 .member .name {
     vertical-align:middle;
 }
-.grp-profile {
-    margin-top:2px;
-}
-.grp-profile .name {
-    font-size:16px;
-    font-weight:bold;
-    margin:0 6px;
-}
-.grp-profile .avatar,
-.grp-profile .name {
-    vertical-align:middle;
-}
-#grp-member-add {
-    margin-top:2px;
-}
 
 /* notification admin */
 .cur-note { color: red; font-size: 75%; }
 
 /* group message and replies */
-#grp-repos-commits td {
-    padding:6px 3px;
-}
 .msg-panel {
     width:640px;
     margin-top:10px;
@@ -2599,7 +2528,6 @@ textarea:-moz-placeholder {/* for FF */
     background-position:0 -207px;
 }
 #user-avatar-input,
-#grp-avatar-input,
 #upload-file-form .files-add input {
     cursor:pointer;
     position: absolute;
@@ -2608,8 +2536,7 @@ textarea:-moz-placeholder {/* for FF */
     opacity: 0;
     filter: alpha(opacity=0);
 }
-#user-avatar-input,
-#grp-avatar-input {
+#user-avatar-input {
     right:0;
 }
 #upload-file-form .MultiFile-label {
@@ -2798,18 +2725,9 @@ textarea:-moz-placeholder {/* for FF */
 #file-edit-cancel {
     vertical-align:middle; /* for ie 7 */
 }
-#sf {
-    width:624px;
-    /*font-size:15px;*/
-    font-size:medium;
-    background:#fff;
-}
-#sf, #md-view {
+#md-view {
     padding:40px 96px;
 }
-#md-edit-help {
-    width:550px;
-}
 /* for repo, file_view page. */
 #side-toolbar {
     position:fixed;
@@ -2851,87 +2769,6 @@ textarea:-moz-placeholder {/* for FF */
     border:1px solid #ddd;
     border-radius:2px;
 }
-#to-group,
-#discuss-to-group {
-    width:400px;
-    padding:0 15px;
-    position:fixed;
-    right:0;
-    border-radius:5px 0 0 5px;
-    background:#fff;
-    border:1px solid #cbcbcb;
-    box-shadow: 0 2px 4px rgba(0,0,0,.2);
-    -moz-box-shadow: -1px 1px 1px rgba(0,0,0,.2);
-    -webkit-box-shadow: 0 2px 4px rgba(0,0,0,.2);
-}
-#discuss-to-group {
-    padding-bottom:10px;
-}
-#discussions-to-grp {
-    height:auto;
-    overflow:auto;
-    position:relative;/*for ie7*/
-}
-#discussions-to-grp .msg {
-    width:380px;
-}
-#discussions-to-grp .msg-main {
-    width:282px;/*for ie7*/
-}
-#discussions-to-grp .reply-input {
-    width:270px;
-}
-#to-group,
-#discuss-to-group {
-    z-index:12; /* to be on top of 'fixed-hd' in repo.html*/
-}
-/*to-group*/
-#to-group {
-    width:auto;
-    min-width:250px;
-    padding:0 12px 10px;
-    right:78px;
-}
-#to-group .outer-caret {
-    position:absolute;
-    top: 15px;
-    right: -15px;
-}
-#to-group .outer-caret,
-#to-group .inner-caret {
-    border-color:transparent #cbcbcb;
-    border-right-width:0;
-}
-#to-group .inner-caret {
-    border-left-color:#fff;
-    top:-15px;
-    left:-16px;
-}
-#to-group ul {
-    padding-left: 20px;
-    list-style-type: disc;
-}
-#to-group a {
-    padding:1px 3px;
-}
-/*discuss to group*/
-#discuss-to-group-form .checkbox-label {
-    display:inline-block;
-    white-space:nowrap;
-    padding-right:3px;
-    margin-right:10px;
-    margin-top:0;
-}
-#discuss-to-group-form .input {
-    padding:5px;
-    width:388px;
-    height:5em;
-    resize:none;
-    vertical-align:top;
-}
-#discuss-to-group-form .attachment {
-    margin-left:5px;
-}
 /* text file diff */
 .file-modification-hd .modifier,
 .file-modification-hd .time {
@@ -2986,29 +2823,6 @@ textarea:-moz-placeholder {/* for FF */
 .diff-chg {
     color: #c3f;
 }
-.pubinfo-item {
-    display:inline-block;
-    min-width:66px;
-}
-.pubinfo-item {
-    *display:inline;
-}
-.ru .pubinfo-item {
-    min-width:64px;
-}
-.de .pubinfo-item {
-    min-width:63px;
-}
-.pubinfo-item .amount {
-    font-size:28px;
-    line-height:1;
-    font-weight:bold;
-    color:#222;
-}
-.pubinfo-item .obj {
-    font-size:11px;
-    color:#999;
-}
 .video-container {
     margin: auto;
     width: 800px;
@@ -3295,6 +3109,8 @@ textarea:-moz-placeholder {/* for FF */
     color:#f93;
     text-decoration:underline;
 }
+
+/* client list */
 .client-list .lib-num {
     cursor:pointer;
 }
@@ -3321,14 +3137,6 @@ textarea:-moz-placeholder {/* for FF */
 #set-quota-form {
     min-width:255px;
 }
-/* lib setting */
-.lib-setting .input,
-.lib-setting .textarea {
-    width:320px;
-}
-.lib-setting .form {
-    margin-bottom:30px;
-}
 
 /* org reg */
 #org-url {
@@ -3629,10 +3437,6 @@ textarea:-moz-placeholder {/* for FF */
 #user-profile .nickname {
     font-size: 18px;
 }
-#user-profile .intro {
-    color: #888;
-    padding-top: 0;
-}
 #user-profile .info {
     border-top: 1px solid #eee;
 }
diff --git a/seahub/base/decorators.py b/seahub/base/decorators.py
index a9366f113d..22068ff906 100644
--- a/seahub/base/decorators.py
+++ b/seahub/base/decorators.py
@@ -10,7 +10,7 @@ from seahub.options.models import UserOptions, CryptoOptionNotSetError
 from seahub.base.sudo_mode import sudo_mode_check
 from seahub.utils import render_error
 from django.utils.translation import ugettext as _
-from seahub.settings import FORCE_SERVER_CRYPTO, ENABLE_SUDO_MODE
+from seahub.settings import ENABLE_SUDO_MODE
 
 def sys_staff_required(func):
     """
@@ -65,7 +65,6 @@ def repo_passwd_set_required(func):
                 return render_to_response('decrypt_repo_form.html', {
                         'repo': repo,
                         'next': request.get_full_path(),
-                        'force_server_crypto': FORCE_SERVER_CRYPTO,
                         }, context_instance=RequestContext(request))
 
             if repo.enc_version == 2 and not server_crypto:
diff --git a/seahub/profile/templates/profile/set_profile.html b/seahub/profile/templates/profile/set_profile.html
index 759cd41f91..f7f644e2ca 100644
--- a/seahub/profile/templates/profile/set_profile.html
+++ b/seahub/profile/templates/profile/set_profile.html
@@ -10,12 +10,6 @@
         <li class="tab"><a href="#user-basic-info">{% trans "Profile" %}</a></li>
         <li class="tab"><a href="#lang-setting">{% trans "Language" %}</a></li>
         {% if user.permissions.can_add_repo %}
-        {% if not force_server_crypto %}
-        <li class="tab"><a href="#enc-lib-setting">{% trans "Encrypted Libraries" %}</a></li>
-        {% endif %}
-        {% if not is_pro %}
-        <li class="tab"><a href="#sub-lib-setting">{% trans "Sub-library" %}</a></li>
-        {% endif %}
         <li class="tab"><a href="#default-lib">{% trans "Default Library" %}</a></li>
         {% endif %}
         <li class="tab"><a href="#del-account">{% trans "Delete Account" %}</a></li>
@@ -87,34 +81,6 @@
 
 {% if user.permissions.can_add_repo %}
 
-{% if not force_server_crypto %}
-<div class="setting-item" id="enc-lib-setting">
-<h3>{% trans "Encrypted Libraries Setting" %}</h3>
-<form method="post" action="{% url 'options_save' %}">{% csrf_token %}
-    <label>{% trans "How to view encrypted libraries online:"%}</label><br />
-    <input type="radio" name="repo-enc" value="server-crypto" {% if server_crypto %}checked="checked"{% endif %} class="vam" />
-    <span class="vam bold">{% trans "Send passwords to the server." %}</span> <span class="vam">{% trans "Files will be decrypted in the server before being sent to you." %}</span><br />
-
-    <input type="radio" name="repo-enc" value="client-crypto" {% if not server_crypto %}checked="checked"{% endif %} class="vam" />
-    <span class="vam bold">{% trans "Save passwords in your browser." %}</span> <span class="vam">{% trans "Files will be decrypted in your browser when you download them." %}</span>
-    <p>{% trans "Tip: the latter way is more secure, but it is not supported well by all browsers. We advise you to use the latest version of Chrome or Firefox." %}</p>
-    <input type="submit" value="{% trans "Submit" %}" class="submit" />
-</form>
-</div>
-{% endif %}
-
-{% if not is_pro %}
-<div class="setting-item" id="sub-lib-setting">
-    <h3>{% trans "Sub-library Setting" %}</h3>
-    <form method="post" action="{% url 'sub_lib_enable_set' %}">{% csrf_token %}
-        <input type="checkbox" name="enable-sub-lib" class="vam" {% if sub_lib_enabled %}checked="checked"{% endif %} /> <span class="vam">{% trans "Enable sub-library" %}</span>
-        <p>{% trans "This feature enables you to selectively sync a folder inside a library. A sub-library can be created from any folder. After being created, it will be listed in your desktop client, and you can download it just like downloading a normal library. It will be automatically kept in sync with its origin library." %}</p>
-        <p>{% trans "Sub-library is also used when sharing a folder to a group or another user. Without this option on, a hidden sub-library will be created automatically in such case. With this option on, those hidden sub-libraries will also be listed, which enables you to manage them." %}</p>
-        <input type="submit" value="{% trans "Submit" %}" class="submit" />
-    </form>
-</div>
-{% endif %}
-
 <div class="setting-item" id="default-lib">
     <h3>{% trans "Default Library Setting" %}</h3>
     {% if default_repo %}
@@ -178,7 +144,7 @@ var all_repos = [];
     all_repos.push({
         'data': '{{ a_repo.props.name }}',
         'attr': {'repo_id': '{{ a_repo.props.id }}', 'root_node': true},
-    });  
+    });
 {% endfor %}
 $('#default-lib').click(function() {
     var form = $('#default-lib-form'),
@@ -205,14 +171,14 @@ $('#default-lib-form').submit(function() {
     lang_context.click(function() {
         lang_selector.toggleClass('hide');
         return false;
-    }).focus(function() { $(this).blur(); }); 
+    }).focus(function() { $(this).blur(); });
 
     $(document).click(function(e) {
         var element = e.target || e.srcElement;
         if (element.id != 'lang-context-selector' && element.id != 'lang-context') {
             lang_selector.addClass('hide');
-        }   
-    }); 
+        }
+    });
 })();
 </script>
 {% endblock %}
diff --git a/seahub/templates/base_for_backbone.html b/seahub/templates/base_for_backbone.html
index 115c1e2fc0..cf330ce136 100644
--- a/seahub/templates/base_for_backbone.html
+++ b/seahub/templates/base_for_backbone.html
@@ -116,9 +116,6 @@
         </div>
 
         <div id="main" class="clear">
-            <div id="title-panel" class="w100 ovhd">
-                {% block title_panel %}{% endblock %}
-            </div>
             <div id="left-panel">
                 {% block left_panel %}{% endblock %}
             </div>
diff --git a/seahub/templates/decrypt_repo_form.html b/seahub/templates/decrypt_repo_form.html
index 720bbdc2e2..bace54d47f 100644
--- a/seahub/templates/decrypt_repo_form.html
+++ b/seahub/templates/decrypt_repo_form.html
@@ -10,11 +10,6 @@
         <input type="password" name="password" autofocus />
         <input type="submit" value="{% trans "Submit" %}" />
         <p class="error hide"></p>
-
-        {% if not force_server_crypto %}
-        {% url 'edit_profile' as profile_edit_url %}
-        <p class="tip" style="margin-top:3em;">{% blocktrans %}You can change how to view encrypted libraries online <a class="normal" href="{{ profile_edit_url }}#enc-lib-setting">here</a>.{% endblocktrans %}</p>
-        {% endif %}
     </form>
 </div>
 {% endblock %}
diff --git a/seahub/templates/js/templates.html b/seahub/templates/js/templates.html
index cbbbc48991..03b24692ee 100644
--- a/seahub/templates/js/templates.html
+++ b/seahub/templates/js/templates.html
@@ -207,7 +207,7 @@
             </div>
             <% if (dirent.perm == 'rw') { %>
             <span class="more-op-icon sf2-icon-caret-down op-icon" title="{% trans "More operations" %}"></span>
-            <ul class="hidden-op dirent-hidden-op hide">
+            <ul class="hidden-op dirent-hidden-op hide dropdown-menu">
                 <li><a class="op rename" href="#">{% trans "Rename" %}</a></li>
                 <li><a class="op mv" href="#">{% trans "Move" %}</a></li>
                 <li><a class="op cp" href="#">{% trans "Copy" %}</a></li>
@@ -218,7 +218,7 @@
             </ul>
             <% } else if (dirent.perm == 'r' && !repo_encrypted) { %>
             <span class="more-op-icon sf2-icon-caret-down op-icon" title="{% trans "More operations" %}"></span>
-            <ul class="hidden-op hide">
+            <ul class="hidden-op dirent-hidden-op hide dropdown-menu">
                 <li><a class="op cp" href="#">{% trans "Copy" %}</a></li>
             </ul>
             <% } %>
@@ -286,7 +286,7 @@
             </div>
             <% if (dirent.perm == 'rw') { %>
             <span class="more-op-icon sf2-icon-caret-down op-icon" title="{% trans "More Operations"%}"></span>
-            <ul class="hidden-op dirent-hidden-op hide">
+            <ul class="hidden-op dirent-hidden-op hide dropdown-menu">
                 <li><a class="op rename" href="#">{% trans "Rename" %}</a></li>
                 <li><a class="op mv" href="#">{% trans "Move" %}</a></li>
                 <li><a class="op cp" href="#">{% trans "Copy" %}</a></li>
@@ -308,7 +308,7 @@
             </ul>
             <% } else if (dirent.perm == 'r' && !repo_encrypted) { %>
             <span class="more-op-icon sf2-icon-caret-down op-icon" title="{% trans "More operations" %}"></span>
-            <ul class="hidden-op hide">
+            <ul class="hidden-op dirent-hidden-op hide dropdown-menu">
                 <li><a class="op cp" href="#">{% trans "Copy" %}</a></li>
             </ul>
             <% } %>
diff --git a/seahub/views/repo.py b/seahub/views/repo.py
index 2e04e40b9f..73bd9b7574 100644
--- a/seahub/views/repo.py
+++ b/seahub/views/repo.py
@@ -24,8 +24,8 @@ from seahub.views import gen_path_link, get_repo_dirents, \
 from seahub.utils import gen_file_upload_url, gen_dir_share_link, \
     gen_shared_upload_link, user_traffic_over_limit, render_error, \
     get_file_type_and_ext
-from seahub.settings import FORCE_SERVER_CRYPTO, \
-    ENABLE_UPLOAD_FOLDER, ENABLE_RESUMABLE_FILEUPLOAD, ENABLE_THUMBNAIL, \
+from seahub.settings import ENABLE_UPLOAD_FOLDER, \
+    ENABLE_RESUMABLE_FILEUPLOAD, ENABLE_THUMBNAIL, \
     THUMBNAIL_ROOT, THUMBNAIL_DEFAULT_SIZE, THUMBNAIL_SIZE_FOR_GRID
 from seahub.utils import gen_file_get_url
 from seahub.utils.file_types import IMAGE
@@ -145,7 +145,6 @@ def repo_history_view(request, repo_id):
         return render_to_response('decrypt_repo_form.html', {
                 'repo': repo,
                 'next': get_next_url_from_request(request) or reverse("view_common_lib_dir", args=[repo_id, '']),
-                'force_server_crypto': FORCE_SERVER_CRYPTO,
                 }, context_instance=RequestContext(request))
 
     commit_id = request.GET.get('commit_id', None)
diff --git a/static/css/backbone.css b/static/css/backbone.css
index 653d5c641b..b869b6568e 100644
--- a/static/css/backbone.css
+++ b/static/css/backbone.css
@@ -17,18 +17,6 @@
     padding-left:30px;
     width:120px;
 }
-.repo-file-list .hidden-op {
-    min-width: 100px;
-    white-space:nowrap;
-}
-.hidden-op a {
-    color:#444;
-}
-.hidden-op a:hover {
-    color:#fff;
-    text-decoration:none;
-    background:#feaa7c;
-}
 /* custom select2 */
 .select2-container-multi .select2-choices {
     border-color: #ddd;
@@ -40,7 +28,7 @@
 }
 .select2-container-multi .select2-choices .select2-search-field input {
     padding:2px 2px 2px 5px;
-    font-family:inherit; 
+    font-family:inherit;
     font-size:13px;
 }
 .select2-container-multi .select2-choices .select2-search-choice {