I stumbled across that later, much easier :).
I seem to be getting a weird bug where after a while the code editor window pops up with 'undefined' in it and I can't do anything further. Uninstalling and reinstalling the extension seems to fix it, but I lose my plugins. Sorry I can't provide much more detail than that, if it happens again I'll see if I can figure anything else out.
An even more awesome feature request than porting it to Chrome for me would be letting me use JQuery in the plugins.
p.s. If this functionality was wrapped up into a slightly more stable standalone app, with really basic alarm clock functionality, I would pay for it in a heartbeat.