importing from solid works

first of all hi ,

i am new to this so i could use all the help i could get .

i watched a tutorial of how to design a wind turbine to solidworks .

I try to import said geometry to comsol . The problem i face is that it is imported as one item thus , i cannot mess around afterwards with the materials etc.

I have thought of taking each part of the turbine and importing it piece by piece , but if you have a quicker solution , much appreciated