Thanks, i hope this works. I was just reading this thread on reddit as well. Should i import the key to the new wallet.dat or replace with the old one? I did install a fresh wallet in a second pc, got it synced, then replaced with the old wallet.dat, nothing. Deleted all files but wallet.dat. Synced all over again but nothing. My last chance is that key thing....
Please read carefully this instructions - you need open debug console in wallet with your old wallet.dat,
export priv key, save it, make clean install of wallet and syncing it -means downloading all blokchain data and then again from debug console with new (empty (wallet.dat)
import your priv key from old wallet.dat to existing one.