Restore your backup wallet.dat. You did make a backup BEFORE transferring funds to a wallet right?
No. I thought myself immune to such problems. Hard lesson learned.
It's not a hard lesson (unless it's something that took you an eternity to mine). You only lost 1.5.
But yes, you must always back things up.
Its a hard lesson considering that I have never ever spent a penny on crypto. All my holdings were mined or earned.