Ok...I feel incredibly stupid right now, but where can I change my online status? I'm "hidden" since I-can't-remember... xD

Personal Tab / Dropdown - User Dashboard - Preferences

Part of the list of options there is called "Stealth Mode" - disable it get rid of that "Hidden".

I tried that before and then my online status turned to "Never" which is even worse than "hidden". xD But now it's working...i guess. ^^ Anyway, thank you. :3