PSPad carsh on my Windows 7 X64

I have been using PSPad 4.5.4 on Windows XP professional for several years. It works fine and I really love it. Recently, I upgrade my PC and run Windows 7 64 bit. However, PSPad crashes all the time on Windows 7 64bit. I also download the latest version 4.5.7. But this version still crash all the time on Windows 7 X64.
Any Suggestion?

Hello
Without crash details I can't you provide any solution. It's Windows crash dialog or PSPad dialog? Can you send me error report?

Jan