Version 5.20 should have installed fine on Windows7. When you say the "installation does not function", what was the problem, was there an error message?

What is a "user installation"?

When you say the input won't open:
- Does the Main Menu start?
- Assuming "yes", when you click the toolbar button to start Piping Input, do you get an error, or does the button quickly change back to the active state?