After changing the navigation typography on my (renamed) Helix Ultimate template I am finding that the changes are not taking effect in the lower level menu headings. I am not using a mega menu so I am assuming that it is OK for me to use menu headings.

This may be related to my long ago renaming of the duplicated default template without first reading "How to Rename Helix Ultimate Template". When I discovered that changes to the duplicate seemed to corrupt the original I purged the site of all unnecessary templates except for a renamed Helix default (another mistake). Since the purge I have been able to make progress using my blindly renamed default but after finally reading the relevant documentation I have tried to clean up my site by reinstalling the current helix ultimate template. However after a fresh installation I still find only my renamed default. Things seem to be mostly working (until this typography issue) and updates seem to be performed OK but I'm not sure of the best way to clean this up and restore a default Helix Ultimate template.