This did not work for me. I first downloaded the scripten file and installed it.
I rebooted and then removed MAS. I rebooted again and then re-downloaded and
installed MAS. I rebooted again and ran MAS. Still no "System Explorers" in the
"Advanced Tools".
Apparently removing MAS leaves files behind. Even after the remove and
re-install it knew my last scan date and "I think" it said I had the Feb 20
definitions. But when I clicked on "Check for updates" it seemed to download an
update and noted that it went from 5687 (I think) to 5691. This happened so
quickly that I missed the details as I expected it to say that I already had the
most current def file.