Hello, I installed the Host (100 domains) version but I need the Pro (30 domains). Now I can't see any kind of setting to change it in Plesk, someone can help me, please? Should I reinstall everything? ATM I don't have the license.
The edition of Plesk is determined only by the installed license. Thus, in order to change Plesk edition, install a suitable license.
Additional help you can get here Licensing and Purchase support