Look for something like this:
Replace abrams with the nameplate you want to use. Once it's fixed it should stay that way even if you make changes in FRED.
Actually if your developing missions or a campaign for future release you should grab at least 3.6.12 and Zathras 2.0. Even better since it's development would be the latest 3.6.13 build and Zathras 2.1 development.