The issue is that Extension Manager has a bug in it where the formats.xml file for each server model has an empty title attribute for each format entry. Remove the title=””, save the file and restart DW, and things should be good to go.
To find the file go to:
%appdata% (or your user application library folder)
then browse to the DW version you are using and continue to:
There will be a formats.xml file for each server model that will need to be updated (assuming that SecurityAssist adds the format to every server model.