I have been running 5.1PE on windows XP since 2009 and now want to switch to Windows 7 for obvious reasons. 5.1 will not install on Windows 7. Is it possible to keep the compiler on the XP machine and run the application on the Windows 7 PC. As there is no license with 5.1 PE, I am not sure whether this will be possible. The other possibility would be to be able to install on Windows 7 and clean up the XP machine. The problem is that it is not possible to upgrade from XP to 7.