Multiple platform license question

I’m well overdue to re-up my subscription and upgrade. I’d like to be able to run it on Windows and MacOS as I use two different computers. Does my fee include licenses for both or one platform only?

There is not a Mac version of Cantabile yet unfortunately.

I had forgotten that! Was hoping to set the Mac up as a backup for rehearsals, etc without having to learn Mainstage and re-create setups for about 200 songs.