Trying to apply the latest patch (patch_victor_vran_2.9.0.15.exe) on Win7 x64 fails.

The contents of the patch_log.txt file are

"Victor Vran patch log
File not found (for patching): C:\GOG Games\Victor Vran\VictorVranGOG.app\Contents\MacOS\VictorVranGOG"

I'm guessing that a windows patch looking for Mac files would qualify as a "bug" :)