Hey everybody!
After installing the new GSX update via the Live Updater, I noticed that I was logged out of the Addon Manager. So I copied my code from the email and pasted it (as usual) into the "Register Serial" window. But whenever I click on "Ok" the window closes without any message. PS: It has not been activated!
There is no error message, nor any other message. No message at all, the window simply closes. Switching off Norton did not solve anything either. It was already like this after the update yesterday...