reply to Gail
I know that when I finally bit the bullet and jumped from Money 2007 to Money Plus, it converted no problem.
In Plus' Help file, it does mention that if you have the old file selected in Windows Explorer, you might get an error trying to convert. Not sure why that'd be, but I mention it anyway.
Also, I used to have a lot of trouble when I had a non-American date format set in my Regional settings (I like "yyyy-mm-dd", but Money didn't). You don't mention if you're upgrading on the same system and same regional settings, but if not, you may want to make sure the date format is the same as when you ran the old version.
The link provided also talks about password-related issues that may or may not affect you.
RipNet (wireless) -} Buffalo WZR-HP-G300NH running DD-WRT -} about 13 machines running Win 2008 R2, Win2003, Vista, Win7 & XP, plus miscellaneous devices.