diff --git a/install.php b/install.php
index ea0f19b..e10db49 100644
--- a/install.php
+++ b/install.php
@@ -1,5 +1,5 @@
 <?PHP
-$rsversion = '1.3.14';
+$rsversion = '1.3.15';
 
 require_once('other/_functions.php');
 require_once('other/config.php');
diff --git a/jobs/bot.php b/jobs/bot.php
index 0d32471..cad3714 100644
--- a/jobs/bot.php
+++ b/jobs/bot.php
@@ -117,7 +117,7 @@ function run_bot(&$cfg) {
 				enter_logfile($cfg,2,"  Error due getting TS3 server version - ".$e->getCode().': '.$e->getMessage());
 			}
 			
-			if(version_compare($ts3version['version'],'3.12.9','<=') && version_compare($ts3version['version'],'3.0.0','>=')) {
+			if(version_compare($ts3version['version'],'3.13.2','<=') && version_compare($ts3version['version'],'3.0.0','>=')) {
 				enter_logfile($cfg,3,"      Your TS3 server is outdated, please update it!");
 			}
 
diff --git a/jobs/check_db.php b/jobs/check_db.php
index 5284d37..74483d8 100644
--- a/jobs/check_db.php
+++ b/jobs/check_db.php
@@ -1,6 +1,6 @@
 <?PHP
 function check_db($mysqlcon,$lang,&$cfg,$dbname) {
-	$cfg['version_latest_available'] = '1.3.14';
+	$cfg['version_latest_available'] = '1.3.15';
 	enter_logfile($cfg,5,"Check Ranksystem database for updates...");
 
 	function check_double_cldbid($mysqlcon,$cfg,$dbname) {
@@ -394,16 +394,18 @@ function check_writable($cfg,$mysqlcon) {
 		}
 		
 		if(version_compare($cfg['version_current_using'], '1.3.14', '<')) {
-			if($mysqlcon->exec("DELETE FROM `$dbname`.`admin_addtime`;") === false) { }
-			if($mysqlcon->exec("DELETE FROM `$dbname`.`addon_assign_groups`;") === false) { }
-
 			if($mysqlcon->exec("INSERT IGNORE INTO `$dbname`.`cfg_params` (`param`,`value`) VALUES ('stats_column_default_sort_2', 'rank'),('stats_column_default_order_2', 'asc') ON DUPLICATE KEY UPDATE `value`=VALUES(`value`);") === false) { } else {
-				enter_logfile($cfg,4,"    [1.3.14] Added new cfg_params values.");
+				enter_logfile($cfg,4,"    [1.3.13] Added new cfg_params values.");
 			}
 
 			if($mysqlcon->exec("INSERT IGNORE INTO `$dbname`.`addons_config` (`param`,`value`) VALUES ('assign_groups_name','');") === false) { } else {
-				enter_logfile($cfg,4,"    [1.3.14] Added new addons_config values.");
+				enter_logfile($cfg,4,"    [1.3.13] Added new addons_config values.");
 			}
+		}
+		
+		if(version_compare($cfg['version_current_using'], '1.3.15', '<')) {
+			if($mysqlcon->exec("DELETE FROM `$dbname`.`admin_addtime`;") === false) { }
+			if($mysqlcon->exec("DELETE FROM `$dbname`.`addon_assign_groups`;") === false) { }
 
 			try {
 				if($mysqlcon->exec("CREATE INDEX `serverusage_timestamp` ON `$dbname`.`server_usage` (`timestamp`)") === false) { }
diff --git a/jobs/db_ex_imp.php b/jobs/db_ex_imp.php
index 3e47148..6094c05 100644
--- a/jobs/db_ex_imp.php
+++ b/jobs/db_ex_imp.php
@@ -106,7 +106,7 @@ function db_ex_imp($ts3,$mysqlcon,$lang,$cfg,$dbname,&$db_cache) {
 				enter_logfile($cfg,2,"  Cannot create $filepath.sql.zip!");
 			} else {
 				$zip->addFile($filepath.".sql",$filename.".sql");
-				if(version_compare(phpversion(), '7.2', '>=')) {
+				if(version_compare(phpversion(), '7.2', '>=') && version_compare(phpversion("zip"), '1.2.0', '>=')) {
 					$zip->setEncryptionName($filename.".sql", ZipArchive::EM_AES_256, $cfg['teamspeak_query_pass']);
 				}
 				$zip->close();
diff --git a/jobs/server_usage.php b/jobs/server_usage.php
index 93ab144..ec48280 100644
--- a/jobs/server_usage.php
+++ b/jobs/server_usage.php
@@ -5,7 +5,7 @@ function server_usage($mysqlcon,$cfg,$dbname,$serverinfo,&$db_cache) {
 	$sqlexec = '';
 
 	// Stats for Server Usage
-	if(key($db_cache['max_timestamp_server_usage'])  == 0 || ($nowtime - key($db_cache['max_timestamp_server_usage'])) > 898) { // every 15 mins
+	if(key($db_cache['max_timestamp_server_usage']) === '' || ($nowtime - key($db_cache['max_timestamp_server_usage'])) > 898) { // every 15 mins
 		unset($db_cache['max_timestamp_server_usage']);
 		$db_cache['max_timestamp_server_usage'][$nowtime] = '';
 
diff --git a/webinterface/_nav.php b/webinterface/_nav.php
index 7e64926..e37a94c 100644
--- a/webinterface/_nav.php
+++ b/webinterface/_nav.php
@@ -269,7 +269,7 @@
 	$err_msg = $lang['winav11']; $err_lvl = 2;
 }
 
-if(!isset($_SERVER['HTTPS']) && !isset($err_msg) || isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != "on" && !isset($err_msg)) {
+if((!isset($_SERVER['HTTPS']) || isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != "on") && !isset($err_msg) && basename($_SERVER['SCRIPT_NAME']) == "index.php") {
 	$host = "<a href=\"https://".$_SERVER['HTTP_HOST'].rtrim(dirname($_SERVER['PHP_SELF']), '/\\')."\">";
 	$err_msg = sprintf($lang['winav10'], $host,'</a>!<br>', '<br>'); $err_lvl = 2;
 }
diff --git a/webinterface/addon_assign_groups.php b/webinterface/addon_assign_groups.php
index f981229..313d2a0 100644
--- a/webinterface/addon_assign_groups.php
+++ b/webinterface/addon_assign_groups.php
@@ -56,7 +56,7 @@
 		$alwgr = substr($alwgr,0,-1);
 		$excgr = substr($excgr,0,-1);
 
-		if(!isset($err_lvl)) {
+		if(!isset($err_lvl) || $err_lvl < 3) {
 			if ($mysqlcon->exec("INSERT INTO `$dbname`.`addons_config` (`param`,`value`) VALUES ('assign_groups_name','{$name}'), ('assign_groups_active','{$assign_groups_active}'), ('assign_groups_limit','{$limit}'), ('assign_groups_groupids','{$alwgr}'), ('assign_groups_excepted_groupids','{$excgr}') ON DUPLICATE KEY UPDATE `value`=VALUES(`value`); DELETE FROM `$dbname`.`csrf_token` WHERE `token`='{$_POST['csrf_token']}") === false) {
 				$err_msg = print_r($mysqlcon->errorInfo(), true);
 				$err_lvl = 3;
diff --git a/webinterface/export.php b/webinterface/export.php
index 1f7a34d..920da7d 100644
--- a/webinterface/export.php
+++ b/webinterface/export.php
@@ -44,7 +44,7 @@ function get_status($lang, $job_check, $check = NULL) {
 			$err_msg .= '</pre><br>';
 			if($job_check['database_export']['timestamp'] == 4) {
 				$err_msg .= "Exported file successfully.";
-				if(version_compare(phpversion(), '7.2', '>=')) {
+				if(version_compare(phpversion(), '7.2', '>=') && version_compare(phpversion("zip"), '1.2.0', '>=')) {
 					$err_msg .= "<br><u>".sprintf($lang['wihladmex2'], "</u>")."<br><pre>".$cfg['teamspeak_query_pass']."</pre>";
 				}
 			}