🚀 go-pugleaf

I just got a Mac SE/30, and have been playing around loading it up with
goodies from the Sumex archives.  I brought home a bunch of things from the
DA directory, and had some fun for a while.  Sometime in the middle of this,
the time appeared in the upper right-hand corner of the screen, and refuses
to go away.  I have tried the obvious-to-a-novice things: clicks of various
flavors on the clock, and removing all files that might sound like "clock"
from the System Folder.  Any ideas what it might be?

More generally, what are good places to find out information about things
like FKEYs, CDEVs, and so forth?  I've downloaded a fair number of them, but
I don't know how to install or use most of them.

Thanks,
  Bard Bloom