I created a silly problem for myself.
After adding a solo player, I renamed it. Most of the fields in the renaming panel were altered in some way. Long story short: the altered fields appear also when I don’t want them to (in other projects).
Is there a reset option, returning abbreviations and plural forms to the Dorico default? I know I can manually change the names back, but I would prefer to nil out every trace of my tinkerings.