Tested the manual port forwarding - no difference, and it doesn't link to a specific application, just IP address. The UPnP tab just shows which app is using that port so probably the name is hardcoded into WireShare (they didn't bother to change it or something)
Still no go...I can't for the life of me figure out what might have happened. The only thing that changed, basically, is Windows, so I'm pretty sure this is OS related.