1. Download the retail patch
2. Extract it with innounp
3. Make copy of your Divinity2.exe
4. Revoke your current activation (run Divinity2.exe with /revoke key)
5. Replace your Divinity2.exe with the latest from patch
6. Copy Patch.dv2 into "..\divinity ii - dragon knight saga\data\Win32\Packed\" directory
Run the game via exe. It will ask you for the key, use your key. Since it's secuROM, the key should be valid as long as it is not in the balck list (so-called "pirated keys").
NOTE: I haven't tried this trick myself. Everything you do is @ your own risk (actually, you lose nothing, but there is always exist some retards that can destroy the whole PC with such simple actions).
P.S. If it does not work then it's clear that secuROm uses different keys for different editions. Which will be weird, coz it was possible to activate russian version of Arcania with EU-keys (secuROM too).
How to return back:
1. Delete both of the copied files.
2. Copy the backup version of the Divinity2.exe
3. Activate and play/wait for the Steam patch.
