So my SMURFS are lost or is there a way to convert it into TSC?
Backup your wallet.
Install the latest version.
Everything should be fine.
That's exactly the same I did.
Made a backup of my old wallet, then deleted it.
Installed the new wallet. Replaced the new wallet.dat with the old one.
But now I'm fully synced and it shows 0 balance. But in the transactions the TCP is confirmed.
Any help how I can repair the wallet, that it shows my balance?
Try starting your wallet from the command prompt using thesmurfscoin-qt.exe -rescan