The game looks pretty damn good, I hope the translation will be soon up to date, I'll try the 1.0.5 anyways.
I'm actually trying to launch it and I have the "game.dat" missing issue, I've played countless wolfRPGs before, and always found a workaround, but I'm really stuck here ... Tried it on desktop, also c drive, the file path doesn't have anything weird in it and is short, it's probably something I'll feel stupid about once I'll know the issue, but it's really an anoying game engine just for that reason.
Edit : I was trying to launch the 1.0.5 version of the game all this time, I tried the 1.2.1 just to check and it worked, weird.