Move/copy the install folder before release, move it back after, and you should only have to download the update.
Do you mean copy/move ..\Steam\SteamApps\common\Divinity - Original Sin to somewhere else while Steam is closed down pre-release of D:OS; then fire up Steam, wait for release to start updating, close down Steam again, then copy/move beta "Divinity - Original Sin" folder back to Steam folder, overwriting everything; then start Steam again...?
How do you know this will work with the release version & has/can anyone from Larian confirm this? Otherwise, why wouldn't a simple Steam update work as per every other game?
