I noticed on Majorgeeks.com that an update 4.0.5226.41987 for Paint.net beta is available. http://www.dotpdn.com/downloads/pdn.html also has that installer available for download.
Downloaded, installed, launched Paint.net, and was immediately advised that an update 4.0.5268.42065 is now available.
What's up with these? It leaves me a bit confused...