diff --git a/classes/file_storage.php b/classes/file_storage.php
index 324b135cdd89571ec1aa1978e59e0d6c4a28d20e..4e7603bfcf9efff6b4cb040ff88e460f751cc883 100644
--- a/classes/file_storage.php
+++ b/classes/file_storage.php
@@ -840,26 +840,4 @@ class file_storage implements \H5PFileStorage {
         // TODO: Implement.
         return false;
     }
-
-    /**
-     * Check if upgrades script exist for library.
-     *
-     * @param string $machineName
-     * @param int $majorVersion
-     * @param int $minorVersion
-     * @return string Relative path
-     */
-    // @codingStandardsIgnoreLine
-    public function getUpgradeScript($machinename, $majorversion, $minorversion) {
-        $context = \context_system::instance();
-        $fs = get_file_storage();
-        $area = 'libraries';
-        $path = "/{$machinename}-{$majorversion}.{$minorversion}/";
-        $file = 'upgrades.js';
-        if ($fs->get_file($context->id, 'mod_hvp', $area, 0, $path, $file)) {
-            return "/{$area}{$path}{$file}";
-        } else {
-            return null;
-        }
-    }
 }
diff --git a/classes/framework.php b/classes/framework.php
index edc5b6a90b1c6a3150eddaeb3f40dd4062490782..c7ed7b1f2f00ec557c164f5626014a1465104465 100644
--- a/classes/framework.php
+++ b/classes/framework.php
@@ -1351,12 +1351,11 @@ class framework implements \H5PFrameworkInterface {
      * Implements getNumContent().
      */
     // @codingStandardsIgnoreLine
-    public function getNumContent($libraryid, $skip = NULL) {
+    public function getNumContent($libraryid) {
         global $DB;
-        $skipquery = empty($skip) ? '' : " AND id NOT IN ($skip)";
 
         return (int) $DB->get_field_sql(
-                "SELECT COUNT(id) FROM {hvp} WHERE main_library_id = ?{$skipquery}",
+                "SELECT COUNT(id) FROM {hvp} WHERE main_library_id = ?",
                 array($libraryid));
     }
 
@@ -1550,7 +1549,6 @@ class framework implements \H5PFrameworkInterface {
                         l1.machine_name,
                         l1.major_version,
                         l1.minor_version,
-                        l1.patch_version,
                         l1.add_to,
                         l1.preloaded_js,
                         l1.preloaded_css
@@ -1579,27 +1577,4 @@ class framework implements \H5PFrameworkInterface {
         global $CFG;
         return (isset($CFG->mod_hvp_library_config) ? $CFG->mod_hvp_library_config : null);
     }
-
-    /**
-     * Implements libraryHasUpgrade
-     */
-    // @codingStandardsIgnoreLine
-    public function libraryHasUpgrade($library) {
-        global $DB;
-
-        return !!$DB->get_field_sql(
-                "SELECT id
-                  FROM {hvp_libraries}
-                  WHERE machine_name = ?
-                  AND (major_version > ?
-                       OR (major_version = ? AND minor_version > ?))
-                  LIMIT 1",
-                array(
-                  $library['machineName'],
-                  $library['majorVersion'],
-                  $library['majorVersion'],
-                  $library['minorVersion']
-                )
-        );
-    }
 }
diff --git a/db/upgrade.php b/db/upgrade.php
index c7833642822955c8dfb02c45b2aa83348e9519cb..a9d391e2fc4a9a4f9dfdc614a698f2396bb34185 100644
--- a/db/upgrade.php
+++ b/db/upgrade.php
@@ -418,7 +418,7 @@ function hvp_upgrade_2018090300() {
         );
     }
 
-    // Add new libraries fields.
+    // Add new libraries fields
     $table = new xmldb_table('hvp_libraries');
     if (!$dbman->field_exists($table, 'add_to')) {
         $dbman->add_field($table,
diff --git a/lang/en/hvp.php b/lang/en/hvp.php
index 68a7a843af0e0ac5457d1f2d0edaf9adf5adedf0..e0948734b4a94d99dda75bdf0af9119e4f59c4cf 100644
--- a/lang/en/hvp.php
+++ b/lang/en/hvp.php
@@ -159,9 +159,6 @@ $string['upgradenothingtodo'] = "There's no content instances to upgrade.";
 $string['upgradebuttonlabel'] = 'Upgrade';
 $string['upgradeinvalidtoken'] = 'Error: Invalid security token!';
 $string['upgradelibrarymissing'] = 'Error: Your library is missing!';
-$string['upgradeerrormissinglibrary'] = 'Missing required library %lib.';
-$string['errorTooHighVersion'] = 'Parameters contain %used while only %supported or earlier are supported.';
-$string['errorNotSupported'] = 'Parameters contain %used which is not supported.';
 
 // Results / report page.
 $string['user'] = 'User';
@@ -200,8 +197,6 @@ $string['nosuchlibrary'] = 'No such library';
 $string['noparameters'] = 'No parameters';
 $string['invalidparameters'] = 'Invalid Parameters';
 $string['missingcontentuserdata'] = 'Error: Could not find content user data';
-$string['olduploadoldcontent'] = "You're trying to upload content of an older version of H5P. Please upgrade the content on the server it originated from and try to upload again or turn on the H5P Hub to have this server upgrade it for your automaticall.";
-$string['anunexpectedsave'] = 'Something unexpected happened. We were unable to save this content.';
 
 $string['maximumgrade'] = 'Maximum grade';
 $string['maximumgradeerror'] = 'Please enter a valid positive integer as the max points available for this activity';
diff --git a/locallib.php b/locallib.php
index d0172f6f3d8cb8cec234a089d95d10f06c0ff916..40ad8b7e424777f4ad6b14fc4216439e8f11926c 100644
--- a/locallib.php
+++ b/locallib.php
@@ -75,8 +75,6 @@ function hvp_get_core_settings($context) {
         'reportingIsEnabled' => true,
         'crossorigin' => isset($CFG->mod_hvp_crossorigin) ? $CFG->mod_hvp_crossorigin : null,
         'libraryConfig' => $core->h5pF->getLibraryConfig(),
-        'pluginCacheBuster' => hvp_get_cache_buster(),
-        'libraryUrl' => $basepath . 'mod/hvp/library/js'
     );
 
     return $settings;
@@ -337,32 +335,16 @@ function hvp_content_upgrade_progress($libraryid) {
         }
     }
 
-    // Determine if any content has been skipped during the process.
-    $skipped = filter_input(INPUT_POST, 'skipped');
-    if ($skipped !== null) {
-        $out->skipped = json_decode($skipped);
-        // Clean up input, only numbers.
-        foreach ($out->skipped as $i => $id) {
-            $out->skipped[$i] = intval($id);
-        }
-        $skipped = implode(',', $out->skipped);
-    } else {
-        $out->skipped = array();
-    }
-
     // Get number of contents for this library.
-    $out->left = $interface->getNumContent($libraryid, $skipped);
+    $out->left = $interface->getNumContent($libraryid);
 
     if ($out->left) {
-        $skipquery = empty($skipped) ? '' : " AND id NOT IN ($skipped)";
-
         // Find the 40 first contents using this library version and add to params.
         $results = $DB->get_records_sql(
             "SELECT id, json_content as params, name as title, authors, source, year_from, year_to,
                     license, license_version, changes, license_extras, author_comments
                FROM {hvp}
               WHERE main_library_id = ?
-                    {$skipquery}
            ORDER BY name ASC", array($libraryid), 0 , 40
         );
 
diff --git a/mod_form.php b/mod_form.php
index d39fdaec170551135d69f974a55fd720556b2807..4df7784841fd63eb2533ce211ae1f508f5c8dbd1 100644
--- a/mod_form.php
+++ b/mod_form.php
@@ -250,15 +250,6 @@ class mod_hvp_mod_form extends moodleform_mod {
 
                     $messages = array_merge(\mod_hvp\framework::messages('info'), $errors);
                     $errors['h5pfile'] = implode('<br/>', $messages);
-                } else {
-                    foreach ($h5pvalidator->h5pC->mainJsonData['preloadedDependencies'] as $dep) {
-                        if ($dep['machineName'] === $h5pvalidator->h5pC->mainJsonData['mainLibrary']) {
-                            if ($h5pvalidator->h5pF->libraryHasUpgrade($dep)) {
-                                // We do not allow storing old content due to security concerns.
-                                $errors['h5pfile'] = get_string('olduploadoldcontent', 'hvp');
-                            }
-                        }
-                    }
                 }
             }
         }
@@ -288,20 +279,15 @@ class mod_hvp_mod_form extends moodleform_mod {
             } else {
                 $data['h5plibrary'] = $library;
 
-                if ($core->h5pF->libraryHasUpgrade($library)) {
-                    // We do not allow storing old content due to security concerns.
-                    $errors['h5peditor'] = get_string('anunexpectedsave', 'hvp');
+                // Verify that parameters are valid.
+                if (empty($data['h5pparams'])) {
+                    $errors['h5peditor'] = get_string('noparameters', 'hvp');
                 } else {
-                    // Verify that parameters are valid.
-                    if (empty($data['h5pparams'])) {
-                        $errors['h5peditor'] = get_string('noparameters', 'hvp');
+                    $params = json_decode($data['h5pparams']);
+                    if ($params === null) {
+                        $errors['h5peditor'] = get_string('invalidparameters', 'hvp');
                     } else {
-                        $params = json_decode($data['h5pparams']);
-                        if ($params === null) {
-                            $errors['h5peditor'] = get_string('invalidparameters', 'hvp');
-                        } else {
-                            $data['h5pparams'] = $params;
-                        }
+                        $data['h5pparams'] = $params;
                     }
                 }
             }
@@ -353,7 +339,7 @@ class mod_hvp_mod_form extends moodleform_mod {
         $core = \mod_hvp\framework::instance();
         $data->disable = $core->getStorableDisplayOptions($options, 0);
 
-        // Remove metadata wrapper from form data.
+        // Remove metadata wrapper from form data
         $params = json_decode($data->h5pparams);
         if ($params !== null) {
             $data->params = json_encode($params->params);
@@ -362,18 +348,17 @@ class mod_hvp_mod_form extends moodleform_mod {
             }
         }
 
-        // Cleanup.
+        // Cleanup
         unset($data->h5pparams);
 
         if ($data->h5paction === 'upload') {
             if (empty($data->metadata) || empty($data->metadata->title)) {
                 // Fix for legacy content upload to work.
-                // Fetch title from h5p.json or use a default string if not available.
+                // Fetch title from h5p.json or use a default string if not available
                 $h5pvalidator = \mod_hvp\framework::instance('validator');
                 $data->metadata->title = empty($h5pvalidator->h5pC->mainJsonData['title']) ? 'Uploaded Content' : $h5pvalidator->h5pC->mainJsonData['title'];
             }
-            $data->name = $data->metadata->title; // Sort of a hack,
-            // but there is no JavaScript that sets the value when there is no editor...
+            $data->name = $data->metadata->title; // Sort of a hack, but there is no JavaScript that sets the value when there is no editor...
         }
     }
 
diff --git a/styles.css b/styles.css
index 36544d987a0c5fa2e0aee2a7ed8c62c9d6a2066e..7d3c0b784cb58e84db7a917340d1c4e91414e709 100644
--- a/styles.css
+++ b/styles.css
@@ -81,6 +81,3 @@
 .h5p-data-view th[role="button"].h5p-sort:hover:after {
     color: #999;
 }
-.content-upgrade-log {
-  color: red;
-}
diff --git a/upgrade_content_page.php b/upgrade_content_page.php
index f9c9ba7c880a3da936b0f33a5cc6e22c9e19f28a..7ac1fee2f53e61f34fe0f6b349620272cea6676f 100644
--- a/upgrade_content_page.php
+++ b/upgrade_content_page.php
@@ -69,9 +69,6 @@ if (count($versions) < 2) {
             'errorScript' => get_string('upgradeerrorscript', 'hvp'),
             'errorContent' => get_string('upgradeerrorcontent', 'hvp'),
             'errorParamsBroken' => get_string('upgradeerrorparamsbroken', 'hvp'),
-            'errorLibrary' => get_string('upgradeerrormissinglibrary', 'hvp'),
-            'errorTooHighVersion' => get_string('upgradeerrortoohighversion', 'hvp'),
-            'errorNotSupported' => get_string('upgradeerrornotsupported', 'hvp'),
             'done' => get_string('upgradedone', 'hvp', $numcontents) .
                       ' <a href="' . (new moodle_url('/mod/hvp/library_list.php'))->out(false) . '">' .
                       get_string('upgradereturn', 'hvp') . '</a>',