roberts, others: I downloaded a fresh copy of jwm.tcz through AppBrowser just before I posted, so it should have been the very latest (at least as fresh as TC 2.4.1 base). I have since deleted jwm, but I suppose I could try again... but I'm just doing this to help out nickispeaki. Although I also wanted to try a short experiment with windowlab, but that would not start either. Maybe because I have renamed flwm executable to something else, and have a symbolic link named flwm pointing back to my locally-built version? But it seems like TC should still be able to override flwm if another WM extensions is loaded.
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Mike L.