Is there a way to make it running GOG version?

[Landarma]

I bought GOG version when it was on sale, and I want to try it out with th Heaven, to test if it is working at least some mods(mostly graphics).  However, I don't know how to make it working.  I copied ff_en to ff7\workingdir as ff7_en.exe, then set game path, but it doesn't work.

Code: [Select]

### Launching Final Fantasy VII ###
Checking System DEP status...
Verifying latest game driver is installed ...
Checking FF7 is not running ...
Checking FF7 .exe exists at E:\Games\GOG Games\FINAL FANTASY VII\ff7\workingdir\ff7_en.exe ...
Checking FF7 Steam if installed correctly......
Verifying installed game is compatible ...
EXE/DLL integrity check failure, please reinstall from CD/GOG or use "Verify my files" to repair.
Failed to launch FF7. View the above log for details.


[Landarma]

Hmm... without uninstalling Steam version?  I want to keep both just to try.