Ken Levy responded to my earlier post with:
Based on the feedback from you and others in the VFP community after the release of VFP, I met with the Microsoft legal team who worked on the VFP 9.0 EULA and they allowed that section to be removed.æ So anyone can upgrade to VFP 9.0 and use “any” previous version on the same machine, no restrictions in the EULA on previous versions related to upgrading.æ You can blog my comment on that if you want so people know who don’t have VFP 9.0 yet.