Admin Styles customization menu Issue.

the module and the plugin ?
if you have both version up to date, then contact me per email with an admin access

ok ,you have a version 3.0.7 which is out to date, the actual version is 3.1.5 (and your subscription is since 6 months)
if you upgrade joomla you shall also upgrade the extension that you install in your website.
I always take my extension up to date to fix new issues with the changes introduced in the latest version of joomla, but of course like any subscription system if you want to update you must have a valid subscription.

If you don't want to uprage the plugin maximenu params, then don't upgrade your joomla