There is a way to Downgrade:
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)