Yes, I know it's an old version, but hopefully that isn't the cause of the problem. I initially used it with WinXP, and currently have Win7.
The change to 7 was made last summer, and all has been well, until lately. The menu bar will not stay attached (docked) to the toolbar; it shows up in the upper right area of the screen. I can drag it over and it attaches, but may not be there next time I open PM.