A family of Microsoft word processing software products for creating web, email, and print documents.
I figured out my issue this morning - because I am on a company-owned machine, I was launching regedit as an admin user. Making the changes to HKEY_CURRENT_USER was changing the field for the admin user, but not my default user account. My own oversight.
Surprisingly, my user account did have permissions to make registry edits, and I was able to update the field as instructed, and it appears to have worked. Thanks for your help!