Hi, on at least two sites, I have an advanced module manager pro and when I want to update them to the latest version it says, it cant update the pro version to a free version. I do not want to go to a free verision, I want to update pro to pro. How can I do this, without prior de-installation of the current version (in order to not loose my module assignments)?

This does not seem to be the problem, I entered the download key, when I installed the first Regular Labs extension on the site and it is still there

No, did not work. I deleted the Download-Key, saved, emptied cache, re-entered the key, went back to system -> update extensions and tried to update, but got the same error.https://freeimage.host/i/J9i5JPR

OK, after deleting the key, rebuilding the update sites and re-entering the key, it found a new version of the Regular Labs extension manager. I updated it, went to system -> update extensions and everything worked. Problem solved. Thank you 🙂