Apologies...you did post that info and I missed it...
Yeah, I don't think there's anything wrong with your litey...I have a semi-retired 1693s myself...solid old workhorse , plus you've got the latest official firmware.
I never use Fabdecrypter myself...I own platinum. However, the decrypting code is the same...

Perhaps a corrupted/bad download, although you've probably already considered this. Still, I'd give it another shot...new download and reinstall.
If this isn't successful, you may be looking at a complete uninstall, clean the registry and start fresh. I'll give it some more thought.

Good luck.