I installed QtSDK-1.2.1 (Qt-4.7.4) on my Windows machines, one running XP, the others Win7. On the Win7 machines I can right-click 'Open with' on a .pro file, and open it with QtCreator. On the XP machine this doesn't work. Even if I browse for qtcreator.exe it will not use it to open the file. The only way I can do it is to start QtCreator then open the project file. Is this the expected behaviour? Is there a fix?