For anyone who, for some reason or the other, checks here before the Larian Vault - the answer to my question:
STEAM ALPHA or STEAM BETA = STEAM FINAL RELEASE
If you have an alpha or beta Steam game, your game will automatically update to the final release. You don't need to do anything.
If you have alpha or beta on Steam but you want the final release on GOG, please come back later to change your Steam key into a GOG key.
So no switching keys if you want to keep the game on Steam. Thanks Larian :]
