The target path of the 'Readme' item in the Start Menu(Windows) is incorrect and initiates the uninstall command. This is for both the modeler and simulator.
Version 1.5.0
I don't usually even think about looking at the readme file but happened to this time.
Oops, yes, this is definitely wrong and will be changed in version 1.6.0.
Should be fixed by now. The reason was that Readme.txt was missing. The installer should now work under Vista as well.