I found a bug in the
\SetProgSty command. Currently, it incorrectly sets the
\ArgSty command instead of
It's possible to get around this bug by patching the command using etoolbox:
but I think this should be fixed in the next release.
I tried emailing the package author but the address given in the manual no longer works. Subscribing to the mailing list also does not seem to work. The author does seem to be active here, though.
Also, the documentation mentions the existence of a
\SetProgArgFnt command, but in the implementation there is no such command.