Hey there, Tan!
You’ll have to forgive me: my German proficiency is very limited but I will do the best that I can to help you out. 🙂
It sounds like (using Google Translate) that you are having an issue where the Licenses tab is not displaying for you in the Events settings.
This could be for a couple of reasons:
- Are you running the same plugin versions? Please check to make sure that both The Events Calendar and The Events Calendar PRO are both at version 3.10.1 and see if that makes a difference.
- Are you running a multisite WordPress installation? If so, you will not see the Licenses tab on a subsite, but will on a parent site. Here is more information on how licenses work on multisite networks.
Let’s start there and see what we find. 🙂
Cheers!
Geoff