The last time I had to revise and recompile an old Fortran program that I wrote, we had CVF 6.? on Win 98 or some old Windows OS. I don't have to do it often but wanted to get a Fortran compiler that would run on Win7-64 in case I want to dig into my old Fortran programs. I originally learned Fortran IV back in 1967 in school.
I'm the last of the Engineers that wrote Fortran programs at our company and I may have a need to revise some code and recompile to get it to run on our PC's so I just need one license for myself.