Never seen a project where the windows wallet has to have port forwarding to sync... a bit odd.
I have UPNP disabled since it's a security risk.
You don't want your wallet to silently open ports for you.
Even then, you will probably have to enable it in your router to allow UPNP.
But it's better to do all that manually.
I don't know if I'm some kind of luddite but when I launch a wallet I expect it to connect and start downloading blocks without any work on my behalf. This is the first wallet I've come across where I'm expected to do some port forwarding just to get synching and that honestly feels purposely obtuse.