Hi James,
I have heard nothing more from Richard Berry about availability of AIP4WIN. The stumbling block seems to be the attitude of the owner of Willmann-Bell Perry Remaklas. I have also used AstroImageJ and confirmed that it gives the same results as AIP4WIN but I find it a bit awkward to use just for photometry.
AIP4WIN does run successfully on Windows 10 if you follow the instructions and remove all previous versions first.
David