The interface is a little tricky. sometimes you have to fumble around a little to find the exact spot to close a window, etc)
Sometimes it's hard to see, like the "shut down" at the cigarettes (to get to overview)

It did run on Win10 with both, english JA2 version from Steam and german JA2 version from CD

The original FFF was a german mod, that's why the texts in Intro are german, game itself will be english