Ok i had problems first with you can't send the correct heartbeat so i uninstalled fGunz and reinstalled, got the same message i replaced all the files as said in the FAQ.When I started the launcher it said it had to restart to finish the update but had to keep updating my antivirus said it had neutralized a virus so first i tried to put off my antivirus it didn't change a thing so i tried to put gunzlauncher in the not to scan files didn't change anything either...
EDIT: so it finally stopped restarting the launcher but now i have the problem with the heartbeat again... *Sigh* =/