Don't give up yet. Can you get to the self-test menu? There's a "restore factory default" option there that is different from the one in the normal menu system. It does in fact reformat the filesystem for you.
If you can still flash, then flashing back to jetBook 0.33g and running both Option 7. Restore Factory Default and 13. Reflash NOR should take care of things.
I doubt that flashing to alternate firmwares, especially when Aluratek has built-in checks to stop you from doing so, is covered by warranty. At least IMO, you can't with a good conscience return it for refund if you have been "tampering" with it.
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