So what's the legitimate NOBL wallet and where can I find it?
https://github.com/eagleflies/noblecoin/wiki/DownloadHere it is. This is the same link provided on the first post of this thread as well, if you want to confirm. It's maintained by Eagleflies and confirmed by Noblecoin's lead developer Rofo.
Thanks mate!
If I understood correctly this is a POS-wallet and it is worthless to import a POW-wallet file in there? My wallet is from 2013-2014 or something like that

Yes you must know your public adress, import privet key from public adress and use it to the new wallet POS
Many post talking about that here , page 595 around
Thank you mate! Syncing my old Noble-wallet right now. Have to check if I still got my coins in there and password recovery is gonna be a bit tricky