Found the solution elsewhere and I'll copy and post it here:
Folks, the GOG Support team have provided me with the solution and it works! Happy to share it below:
Please download the files from the link below and copy all 3 of them into the game's folder:
https://www.dropbox.com/s/f1uk809y94ambdm/DgVoodooOLD.zip?dl=0 - If the game was installed via GALAXY, please select the game in GALAXY, click on the icon on the right side of the PLAY button -> Manage Installation -> Show Folder
- If the game was installed via offline installer, then you will have to manually navigate to the game installation folder, by default it's: C:\GOG Games\game-title\