BlackHell: I installed and played a little. Then i installed 1.05 Patch but it gave issues with the profile and the savegames.
It didn't save. So i deleted the Profile folder but after that it won't start again. I uninstalled it, deleted all registry with psychonauts and installed again.

If i now install psychonauts, it starts but if install patch 1.05 it won't.

Windows 7 64bit.

BlackHell: Thank you. I will try the new installer and tell what happend.

After downloading and installing Psychonauts with the new installer one thing was great to see:
The language selector.

And one thing was not so good to see:
Three made Profiles with the Names: Dan, Raz and Daniel.

Is ist Version 1.04 or has the new installer 1.05? Don't know where to see this ingame.

I make some more tests.