You can read them natively, but not write them. As far as I recall, the Miraizon codec is the only way to do it, so, if you must have ProRes and you can't get a Mac to do it for you, Miraizon is the way to go.
could it be that it's not supported anymore? Miraizon Store
I remembered a thread that talked about ProRes on windows an someone recommended AWPRO and another that said it's now called ClipToolsConvert: Convert V3 Home Page here is the user guide: Convert V3 Users Guide and it has ProRes. worth checking out. please share the results of your findings.
Oh. I will have to update my brain's database. *makes beeping noises*