Thanks. Can you be more specific as to what files to delete? There are about probably 30 files in the wallet directory folder along with a /resources folder. Inside the /resources folder are /bin, /icons/ and /www
edit: I dont see a wallet.dat file.
First,
make sure you have a back up of your Mnemonic seed and Private key in a safe place. You could try to uninstall the wallet after. Assuming that your using Windows, inside that directory you mentioned there is a wallet_uninstaller file, use that to uninstall it (just double click and confirm). After that, install the wallet again, open it by running as admin, then restore from seed.
Afaik there is no wallet.dat file