Something is unstable with the Sickrage plugin. Yesterday, after all the problems I encountered lately (see other posts) I had it running again after a complete reinstall and suddenly, after I pressed on the Upgrade now banner within Sickrage, it restarted having completely lost all my data, refusing to restore from backup, and messing all the interface, visually.
Therefore, after yet another reinstall, I also disabled all the upgrade/update functionalities within Sickrage.
As I read the previous posts I also understand that I should refrain from upgrading to 6.1.0 as Limeware have officially started to roll it out through their Dynamix interface. And until a new plugin is released.