Version checks now rely on GitHub. The program was crashing on start up for me when checking for new updates on Linux (only). I have put in a "fix" that seems to work.
Online help is now on GitHub. The program was also having trouble starting the web browser on Linux (only). I have put in another means of starting the browser that works here.
As the program is pretty much "done", I finally added the warranty and licence info to the Help menu.
And, as ever, I also made a few code improvements.
This is now considered a release version.