Restarting from fresh

Hi,

I have one generic question regarding a definition of 
variables/instances/functions/... in Lispworks. Let's say that I define 
some variables, functions, load precompiled files, etc. After some 
testing period, I would like to remove all definitions of variables, 
functions and other objects I defined before and would like to start 
from a fresh without closing Lispworks environment.

Is that possible by any means?


Best Regards,
Lukas