Is there a trick to getting this to launch via Galaxy in Windows 10? I have never been able to run it. I click play, and the button in galaxy goes grey, I can see the .exe in the Task Manager, but no window, no taskbar entry... nothing.

Hello, I know it's been a while but I have the same problem, and my solution is to click on "Play", wait until the button becomes grey, open Task Manager and kill the "Textorcist" process (it's listed as a subprocess of "GOG Galaxy (32 Bit)"). Then close Task Manager, go back to Gog Galaxy and launch the game again. It will work normally until you reboot your system.