Taking more code from the Markin program, I've implemented the update checking routines into the application. I also customized a Nuvola icon to use for the Update action, generated bitmaps for it, and rebuilt the icon dll to include it. Then I coded the PHP page which parses the version info passed to it, and shows customized update information (only the updates done subsequent to the user's version number).

"Check for updates" now seems to be complete and working, so the next stage is to update the documentation -- I think I could mention the update checking on the "Installing and Unistalling" page, and I'll also need to update the version info on the Help file itself. Then I can document the new feature on the updates page itself, build an installer, and do a new release. Should be done by lunchtime tomorrow.