Rob,
The class browser was an add on in VFP 3.0. If you want it in your menu all the time modify your Config.fp file and add this line;
COMMAND=DO Startup.prg
The put a program named Startup.prg in your VFP home directory with this line in it;
DO (_BROWSER) WITH 0
The calss browser is not part of the default menu in VFP 3.0, I think it may be part of the menu in VFP 3.0b but I'm not sure.