Try to start the new wallet without your wallet.dat, let it build a new one but keep you original wallet.dat in a safe place.
If the wallet can finish to sync, close it and replace the wallet.dat.
You can try to reboot your computer before you start the new wallet.
Let me know if this works.
Wallet is synced. Coins are in wallet. But problem is this same: (sometimes directly after opening, sometimes after few seconds/one/two minutes )
"This application has requested the Runtime to terminate it in an unusual way.
Please contact to application's suport team for more information."
and wallet is shutting down
