Saving F-Prot settings

I would like to set various preferences within F-prot for DOS.
Sometimes when I exit, it offers to save the settings, but the
only thing that seems to get saved is the "which disk to scan"
property.

If I ask it to save "do not scan within archives" and
"do not scan compressed executables" F-prot reverts back
to the default upon exit, even after I say yes when it asks if
I would like to save them..

This occurs under pure MS-DOS v7, system booted from
a floppy. Everything else with F-prot works fine.

Anyone else experienced this?

Thanks