Ok so I deleted that registry message. Although I have tried back-tracking and got PlayDRM to trip again by deleting the PlayDRM folder in my AppData/Roaming+Registry, and I just imported the registry again and it worked without having to enter a key. From reading from other threads it seems just the key may work, BUT, you also need the corresponding hardware ID since it is based upon hardware IDs and online server-side authentication.
I will compress my game files from which I downloaded from here as well, but with the same Hardware ID I have used to test, and then upload the registry files again.
Since I cannot test this myself and people are willing to try just to get around the DRM, Please try to follow what I say so we would know where to go next if things do not work out
Download both the game files and registry, Unpack game files, launch the game 1 time to trip DRM DO NOT LAUNCH THE GAME FIRST BEFORE IMPORT!!!, import/install registry, check your AppData/Roaming for a folder called "PlayDRM" or go to regedit, >edit>Find (or CTRL+F) and look for "PlayDRM" if both or just 1 does appear, try launching the game.
Use only MY files since I am not sure if the Hardware ID changes for every instance or unload of the file and tripping the DRM on a failed launch/needing to register launch.
CYANBRAIN Main Files
PlayDRM Registry Import