PilotEdge Receiver is a standalone monitoring tool for listening in to PilotEdge ATC communications.
It's available for Mac & Windows here: http://www.pilotedge.net/pages/pilotedge-receiver
This initial release has a hardcoded channel list and doesn't actively detect which controlling positions are staffed. Give it a try, you'll soon see how it all works.
Unzip all the files, run the EXE, click CONNECT, then click the positions you want to monitor. This is an early beta, but it's a great start. Use this to monitor PE during operating hours. Outside of those hours, it will automatically disconnect.
Many thanks to Brett for putting this together. I'll let him take it from here.