How interesting. If it was the firmware it would be next to zero chance (if the downloaded files are still only Arduino code). Although maybe, there are enough uBITX transceivers out there that some enterprising hackers might find a way take an army of zombi uBITX bots to wirelessly send stolen BitCoins to remote regions.
But, since the manager is an executable program, I'd be cautious. Hopefully others will be able to confirm or deny if there is a problem.
Tom, wb6b