My wallet got corrupted after using coin control feature for sending 0.001 to address mentioned in rules in discord. I tried repairwallet without success, but importing private key to a new wallet worked. I missed airdrop #5, cannot miss #6.
It is really strange, I'm always use coin control and never have such problems. How wallet was corrupted, what error was, can you give us snapshot?
I'm think you have problem with hard drive, or your database was corrupted if wallet was closed from task manager, need more information.