The new version of MM 2025 have a huge bug. Even when I will be off line it is trying to connect/sync with store and no instrument which I currently own is awailable to use. I never observed this issue on the older version.
The issue seems to be resolved thanks to responds I have got by email from Magix team.
It was needed to apply reset procedure. "File" menu => "Settings" sub menu => "Reset program settings" option. I marked all items in the list and did the reset.