Hello Andre,
Thanks for reaching out to us. I checked your site and did not notice any issues with the menu—it appears to be working correctly. I also adjusted the template style settings and saved the changes to verify, but I did not encounter any problems.
Please take a look at the pinned post on our forum. Many users have reported similar issues after a Joomla update, as it does not properly handle checkbox values in template options. To address this, we have provided a quick solution in the forum.
I have already applied this fix to your site, so you should no longer experience this issue.
Thanks for your understanding.
Best regards,