Any lawyer will probably say it infringes EULA or whatever -- it just does not matter.
I disagree... What I personally do and what legal risks I'm willing to take is one thing.
But it's a different matter altogether if I sell this solution to customers, most of which are substantially larger businesses than my own. These customers have volume licenses and get audited by Microsoft, Oracle, etc. Moreover, many countries distinguish between using and distributing. Should using this software be a violation of intellectual property (which is open at this point), then selling solutions might trigger more serious legal consequences.
It's not a matter of whether it's good to have VFP support for 64-bit (which is great), or whether Microsoft has any interest in VFP (they don't). It's a business decision on how much risk you are willing to take on something that is at least a gray area. Sometimes such decisions turn out to be wrong and expensive, as Volkswagen is currently learning.