Any BIOS that shows up as Unknown.. under the EVOVULTION X Dashboard.. means that the BIOS HASH was not added to the EVOX.INI.
Do it manually.. by adding the line ROM = YOURUNKNOWNBIOSHASHHERE!
If you notice.. there is a nice list that is pinned.. in all likelyhood. any BIOS you might have is listed there.. so add that list to your EVOX.INI file.
This should replace UNKNOWN with something more sensible!