Take a look at this screenshot:
As you see we can show a menu in FileMaker using next MBS Plugin. But it seems like we can't port all the goodies from Mac to Windows. For example windows seems not to support tooltips, keyboard equivalents, mixed state or even transparency in images here.
We'll continue to improve it, but I'm actually very happy to get at least some features working like submenus, checkmarks, separators, disabled items and the script triggers.