I found the file. The name had a couple of letters juxtaposed in khobson's first reply.
Unfortunately, after changing the name,
and installing a third, non-HP, print driver, setting it as default, and print-to-file,
and finding my temp files and deleting them,
and uninstalling WP again,
rebooting, with system restore turned off,
and reinstalling the program...
it still will not initialize.