Here is my quick little guide. Dont held me responsible if you screw up something on your registry.
32bit user: use regedit:  HKEY_LOCAL_MACHINE\SOFTWARE\Stardock\Drengin.net\Demigod      and change the version to 1.00.054
 
64bit user: use regedit:   HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Stardock\Drengin.net\Demigod     and change the version to 1.00.054
 
then go into impulse, remove the check on the beta software(dont update at this point), close impulse, and relaunch it. there will be an update available.
(update it youll be back on the official game)