I tried to wipe via the stock recovery, but all the FC's was still there, and what's worse was that because of the FC's I couldn't finish (or quit) the "Set up your tablet" thingie. I always crashed on setting up a gmail account. Didn't matter if I was connected to the internet or not, or if I declined setting it up. So I had to do everything from the stock recovery.
Downloaded the .8 firwmare, unpacked the first .zip file, renamed the second .zip (to EP201_768_SDUPDATE.zip) and put it on an empty micro SD, made sure the SD-card was FAT32, booted to recovery (Power Vol down for 5 sec) and installed it via RCK, Android stock recovery.
Thanks for the tip, though. It might have worked. I don't know.
HTC Hero | HTC Desire HD | HTC Sensation XE | Samsung Galaxy SIII | Oppo Find 5