about pro Mechanica i need help

I'm studing pro Mechanica for the first time and so my questions are quite
silly.....I 'd like to know how finding the library of the materials.Can you
tell me where it is stored??? Another problem : when you are launching
MECHANICA, you pull down the menus at the top selecting
Applications>Mechanica:an information windows appears, reminding me the
units of the problem.After the check of the units i press the CONTINUE
bottom and the Model type window is opened.Now i read on Pro/E WF tutoriall
that the FEM Mode check Box ,Inside the Model Type window allows me to model
the pre-processing only:With this checked, i can apply constrain,loads and
define materials and crate mesh BUT I CANNOT RUN THE SOLVER.For this reason
if I'm going to use the MECHANICA solver,FEM Mode must be left...But the
main problem is that i cannot disable the Fem Mode option.
thank you
Edoardo