If you change the name in the Ships cfg file?
Check the Names.cfg in Roster folder.
THEN check each Countries Roster Folders for that Unit.
It's also possible to whack Campaign files and such by a name change!
This is a prime reason I use 010 to do a search and replace.
Yep. Just verified if you rename the class it whacks the campaign files also.
Now the Search and replace in 010 will do it for you as it is.
But it will search through a lot of files if not set up right.
Make sure you tell it the file extensions!!
If you don't have 010 you can download a free 30 day trail version.
I highly recommend it!!