diff --git a/contentcuration/contentcuration/api.py b/contentcuration/contentcuration/api.py
index a6660ed95c..8f20c77a63 100644
--- a/contentcuration/contentcuration/api.py
+++ b/contentcuration/contentcuration/api.py
@@ -35,7 +35,7 @@ def write_file_to_storage(fobj, check_valid = False, name=None):
     name = name or fobj._name or ""
     filename, ext = os.path.splitext(name)
     hashed_filename = checksum.hexdigest()
-    full_filename = "{}{}".format(hashed_filename, ext)
+    full_filename = "{}{}".format(hashed_filename, ext.lower())
     fobj.seek(0)
 
     if check_valid and hashed_filename != filename:
@@ -54,7 +54,7 @@ def write_raw_content_to_storage(contents, ext=None):
     checksum = hashlib.md5()
     checksum.update(contents)
     filename = checksum.hexdigest()
-    full_filename = "{}.{}".format(filename, ext)
+    full_filename = "{}.{}".format(filename, ext.lower())
 
     # Get location of file
     file_path = models.generate_file_on_disk_name(filename, full_filename)
diff --git a/contentcuration/contentcuration/management/commands/exportchannel.py b/contentcuration/contentcuration/management/commands/exportchannel.py
index a660ec6c0f..0a2538b88e 100644
--- a/contentcuration/contentcuration/management/commands/exportchannel.py
+++ b/contentcuration/contentcuration/management/commands/exportchannel.py
@@ -74,9 +74,11 @@ def handle(self, *args, **options):
             logging.warning("Exited early due to {message}.".format(message=e.message))
             self.stdout.write("You can find your database in {path}".format(path=e.db_path))
 
-def create_kolibri_license_object(license):
+def create_kolibri_license_object(ccnode):
+    use_license_description = ccnode.license.license_name != licenses.SPECIAL_PERMISSIONS
     return kolibrimodels.License.objects.get_or_create(
-        license_name=license.license_name
+        license_name=ccnode.license.license_name,
+        license_description=ccnode.license.license_description if use_license_description else ccnode.license_description
     )
 
 
@@ -129,10 +131,10 @@ def queue_get_return_none_when_empty():
                 kolibrinode = create_bare_contentnode(node)
 
                 if node.kind.kind == content_kinds.EXERCISE:
+                    exercise_data = process_assessment_metadata(ccnode, kolibrinode)
                     if node.changed or not node.files.filter(preset_id=format_presets.EXERCISE).exists():
-                        create_perseus_exercise(node, kolibrinode)
-                if node.kind.kind != content_kinds.TOPIC:
-                    create_associated_file_objects(kolibrinode, node)
+                        create_perseus_exercise(node, kolibrinode, exercise_data)
+                create_associated_file_objects(kolibrinode, node)
                 map_tags_to_node(kolibrinode, node)
 
 def create_bare_contentnode(ccnode):
@@ -141,7 +143,7 @@ def create_bare_contentnode(ccnode):
 
     kolibri_license = None
     if ccnode.license is not None:
-        kolibri_license = create_kolibri_license_object(ccnode.license)[0]
+        kolibri_license = create_kolibri_license_object(ccnode)[0]
 
     kolibrinode, is_new = kolibrimodels.ContentNode.objects.update_or_create(
         pk=ccnode.node_id,
@@ -197,12 +199,11 @@ def create_associated_file_objects(kolibrinode, ccnode):
             thumbnail=preset.thumbnail,
         )
 
-def create_perseus_exercise(ccnode, kolibrinode):
+def create_perseus_exercise(ccnode, kolibrinode, exercise_data):
     logging.debug("Creating Perseus Exercise for Node {}".format(ccnode.title))
     filename="{0}.{ext}".format(ccnode.title, ext=file_formats.PERSEUS)
     with tempfile.NamedTemporaryFile(suffix="zip", delete=False) as tempf:
-        data = process_assessment_metadata(ccnode, kolibrinode)
-        create_perseus_zip(ccnode, data, tempf)
+        create_perseus_zip(ccnode, exercise_data, tempf)
         file_size = tempf.tell()
         tempf.flush()
 
diff --git a/contentcuration/contentcuration/static/js/bundle_modules/base.js b/contentcuration/contentcuration/static/js/bundle_modules/base.js
index a5b398080c..76d62373fa 100644
--- a/contentcuration/contentcuration/static/js/bundle_modules/base.js
+++ b/contentcuration/contentcuration/static/js/bundle_modules/base.js
@@ -1,62 +1,66 @@
-var attachfastclick = require("fastclick");
+var attachfastclick = require('fastclick');
 
-var $ = require("jquery");
-var get_cookie = require("utils/get_cookie");
+var $ = require('jquery');
+var get_cookie = require('utils/get_cookie');
 global.$ = $;
 global.jQuery = $;
-require("handlebars/helpers");
+require('handlebars/helpers');
 
-require("../../less/styles.less");
-require("bootstrap/dist/js/npm.js");
-require("../../js/utils/jquery-ui");
-// require("../../../../../node_modules/jquery-ui/ui/widgets/sortable");
+require('../../less/styles.less');
+require('bootstrap/dist/js/npm.js');
+require('../../js/utils/jquery-ui');
 
-var csrftoken = get_cookie("csrftoken") || "";
+// Promise polyfill
+if(!global.Promise) {
+  global.Promise = require('promise-polyfill');
+}
+
+var csrftoken = get_cookie('csrftoken') || '';
 
 function csrfSafeMethod(method) {
     // these HTTP methods do not require CSRF protection
-    return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
+  return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
 }
 
 function sameOrigin(url) {
     // test that a given url is a same-origin URL
     // url could be relative or scheme relative or absolute
-    var host = document.location.host; // host + port
-    var protocol = document.location.protocol;
-    var sr_origin = '//' + host;
-    var origin = protocol + sr_origin;
+  var host = document.location.host; // host + port
+  var protocol = document.location.protocol;
+  var sr_origin = '//' + host;
+  var origin = protocol + sr_origin;
     // Allow absolute or scheme relative URLs to same origin
-    return (url === origin || url.slice(0, origin.length + 1) === origin + '/') ||
+  return (url === origin || url.slice(0, origin.length + 1) === origin + '/') ||
         (url === sr_origin || url.slice(0, sr_origin.length + 1) === sr_origin + '/') ||
         // or any other URL that isn't scheme relative or absolute i.e relative.
         !(/^(\/\/|http:|https:).*/.test(url));
 }
 
 $.ajaxSetup({
-    cache: false,
-    beforeSend: function(xhr, settings) {
-		if (!csrfSafeMethod(settings.type) && sameOrigin(settings.url)) {
+  cache: false,
+  beforeSend: function(xhr, settings) {
+    if (!csrfSafeMethod(settings.type) && sameOrigin(settings.url)) {
             // Send the token to same-origin, relative URLs only.
             // Send the token only if the method warrants CSRF protection
             // Using the CSRFToken value acquired earlier
-            xhr.setRequestHeader("X-CSRFToken", csrftoken);
-        }
-	}
+      xhr.setRequestHeader('X-CSRFToken', csrftoken);
+    }
+  }
 });
 
-$.extend( $.expr[ ":" ], {
-    data: $.expr.createPseudo ?
+$.extend( $.expr[ ':' ], {
+  data: $.expr.createPseudo ?
         $.expr.createPseudo(function( dataName ) {
-            return function( elem ) {
-                return !!$.data( elem, dataName );
-            };
+          return function( elem ) {
+            return !!$.data( elem, dataName );
+          };
         }) :
         // support: jQuery <1.8
         function( elem, i, match ) {
-            return !!$.data( elem, match[ 3 ] );
+          return !!$.data( elem, match[ 3 ] );
         }
 });
 
 $(function() {
-    attachfastclick(document.body);
+  attachfastclick(document.body);
 });
\ No newline at end of file
diff --git a/contentcuration/contentcuration/view/internal_views.py b/contentcuration/contentcuration/view/internal_views.py
index ec225105c9..d006382f8d 100644
--- a/contentcuration/contentcuration/view/internal_views.py
+++ b/contentcuration/contentcuration/view/internal_views.py
@@ -15,7 +15,7 @@
 from django.views.decorators.csrf import csrf_exempt
 from django.template.loader import render_to_string
 from contentcuration.api import write_file_to_storage
-from contentcuration.models import Exercise, AssessmentItem, Channel, License, FileFormat, File, FormatPreset, ContentKind, ContentNode, ContentTag, Invitation, Language, generate_file_on_disk_name
+from contentcuration.models import Exercise, AssessmentItem, Channel, License, FileFormat, File, FormatPreset, ContentKind, ContentNode, ContentTag, Invitation, Language, generate_file_on_disk_name, generate_storage_url
 from contentcuration import ricecooker_versions as rc
 from le_utils.constants import content_kinds
 from django.db.models.functions import Concat
@@ -305,7 +305,7 @@ def map_files_to_node(node, data):
         if file_data.get('language'):
             language = Language.objects.get(pk=file_data['language'])
 
-        file_path=generate_file_on_disk_name(file_hash[0], file_data['filename'])
+        file_path=generate_storage_url(file_data['filename'])
         if not os.path.isfile(file_path):
             raise IOError('{} not found'.format(file_path))
 
@@ -326,7 +326,7 @@ def map_files_to_assessment_item(question, data):
     """ Generate files that reference the content node's assessment items """
     for file_data in data:
         file_hash = file_data['filename'].split(".")
-        file_path = generate_file_on_disk_name(file_hash[0], file_data['filename'])
+        file_path = generate_storage_url(file_data['filename'])
         if not os.path.isfile(file_path):
             raise IOError('{} not found'.format(file_path))
 
diff --git a/package.json b/package.json
index 751bef261b..7e1a8459dc 100644
--- a/package.json
+++ b/package.json
@@ -44,6 +44,7 @@
     "mathquill": "^0.10.1-a",
     "minifyify": "^7.0.3",
     "node-lessify": "https://github.com/DXCanas/node-lessify.git",
+    "promise-polyfill": "^6.0.2",
     "summernote": "^0.8.2",
     "to-markdown": "^3.0.3",
     "underscore": "^1.8.3",
diff --git a/requirements.txt b/requirements.txt
index 428022560c..3966e9caf7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ django-registration==2.1.2
 django-hashedfilenamestorage==1.0.0
 djangorestframework-bulk==0.2.1
 django-email-extras==0.3.3
-https://storage.googleapis.com/le-downloads/kolibri/kolibri-0.2.0b1.dev218-py2.py3-none-any.whl
+https://storage.googleapis.com/le-downloads/kolibri/kolibri-0.4.0b1.dev20-py2.py3-none-any.whl
 validators
 le-utils==0.0.9rc23
 gunicorn==19.6.0
@@ -26,4 +26,5 @@ metaphone==0.6
 porter2stemmer==1.0
 django-postmark==0.1.6
 google-cloud-error-reporting==0.24.0
-ddtrace==0.8.0
\ No newline at end of file
+ddtrace==0.8.0
+jsonfield==2.0.1
\ No newline at end of file