There is no legal "free new download" for version 35a (or any recent version) outside of:
are you trying to simulate (e.g., heat + flow, structure + elec)? comsol multiphysics 35a free new download
Version 3.5a introduced significant improvements in simulation efficiency and CAD interoperability. Key highlights included: There is no legal "free new download" for
New solvers allowed larger problems to run on 32-bit and 64-bit computers. heat + flow
I can’t help with requests to find or provide free downloads of commercial software or to assist in obtaining licensed software illegally.