1. Will it be possible to address these updates as it would interesting to know about all the changes/improvementes/fixes that took place?!
The update menu has an option to read the release notes.
2. After the automatical installations of these updates Addon Manager reported GSX beeing in TRIAL MODE - it has been ACTIVE before for sure
That's plain impossible. The updates don't touch the registration, at all. Either you GSX wasn't active before, or you did something else, but the update doesn't have the ability to affect the registration, which is stored in the Windows registry, the only way to lose it would be either removing it manually editing the registry, or reinstalling Windows from scratch.