The plugin appears to work perfectly with blender 245.17 (246 RC3). At least, it successfully exported TunnelDemo and all of it's features. Given the amount of stuff in there, I'm going to take that to mean it works.
However, installing the PyPRP scripts may be a little more difficult for windows users not familiar with the windows ApplicationData folder setup. The ".blender/scripts" directory is no longer contained in "C:/Program Files/Blender Foundation/Blender", but in "C:/Documents and settings/<UserName>/ApplicationData/BlenderFoundation/Blender"