Windows 7 will run ALL version of FMPRO doing this ...
One of the many surprises MS has given us with Windows 7 is the ability,provided your hardware supports virtualization is the ability to setup and run XP Mode with sp3 under a virutal PC which Microsoft makes available for free at http://www.microsoft.com/windows/virtual-pc/download.aspx
They have a utility you can run to test your hardware to ensure it runs virutal pc and xp mode sp3.
I have not tested this fully as I do not have an older version nor a demo copy - but in theory, if whatever version you were using works with XP -- then it should work in Windows 7 running virutal pc with xp mode.
Basically, once you've installed virtual pc with xp mode. You install fmpro version on your pc -- right click properties for the fmpro icon -- select the compatability tab, select xp sp3 compatability mode for said application and it will now run that app under the virtual pc/xp sp3 -- voila!
I dont have a copy of demo or older version, but for the daring, let me know if it works.