Rainer Brockerhoff wrote:

Maybe I should, after all, implement regular automatic version checking? I dislike such automatic processes myself, but I’ll look into doing it less obtrusively.

So, it’s done; Klicko 1.1 (187) has automatic version checking.

Details were trickier than I had anticipated, but I managed to do it while increasing download size by only 44K (23%). Most of that is accounted for by a new helper application. The background process checks for updates periodically. If an update is out, the process runs the helper app to display an alert; the user can then ask the app to run System Preferences to download and install the update. (If the Klicko panel is already open, the helper app isn’t called.)