Oh my god, you're right! Sorry.
Alright, now WME starts up, but the problem now is that i can't open my project files.
I choose "open", browse to my project folder (it's in my documents folder), where i click on "rott.wpr". But nothing happens, WME freezes and i can't click on anything anymore.
The only thing i can do is click on the red X (the upper left corner of the window) to close the whole application, but within WME there's nothing i can do.
At first i thought it's because there is some kind of a virtual Windows directory inside of the Wintermute package.
Because when i open the finder, browse to my applications folder, rightclick on Wintermute and then "Show package contents", there is a c:\ with those standard Windows folders.
But i also tried to copy my project folder into the Wintermute package, so that it's stored in the Windows directory.
Doesn't work either, same problem.
At last i tried to open a new project.
So in WME i clicked on "new", entered a project name and clicked "ok". But then there is the same problem again ... WME freezes.
So it seems WME isn't able to open a project in general.
Bad thing ...
PS:
But running a compiled WME game works fine and without any problems.