I am using Ver. 3.01 on my computer, that has Win. 10 in it. No issues at all. The only problem I have with the program is the size of the display. I had to play around with it for a while until was the size that worked.
I have used/bought a lot of logging programs, and for me, WIN-EQF works great. I bought the dos version of the program way back when and when it was no longer supported tried other programs. Some good, a couple very good, but for my old brain, WIN EQF was easy to use. I was super happy when someone, whose call I can't remember sent me 3.01. No regrets and happy to have it as my main logging program.