1st step: Combination of key: WIN + R >>> type and valid "appdata"
Step 2: Open the "Roaming" folder and open the Bitradio folder
Step 3: Save the "wallet.dat" file in a USB key. The date displayed in front of your backup lets you know when your last backup took place
Step 4: Delete all files and folders except wallet.dat.
Step 5: Reinstall the wallet
Step 6: Begin to pray for it to work.