I'm running Windows 10, the superpowers.exe has always been allowed through the firewall. I recently turned off my Avast antimalware to see if that made any difference, but it didn't. The server still keeps dying after 10 minutes or so. It is pretty much impossible to develop anything with this, as it is right now.
[update]
So all this time I have been using the x64 version of superpowers.... because Windows 10 64bit, makes sense right? Well out of curiosity I downloaded the x32 version and ran it, and have not had a single disconnection since.
So... its definitely a problem with the 64 bit build. But noting that these builds are well over a year old, it appears that development has stalled or canceled... so who knows if there will ever be a fix for this?
At least the 32 bit version seems to work~