CAD Import Module Error...

Hi,

I have created a CAD model and tried to import it into COMSOL, but I was encountered with this error:

''Feature: Import 1
CAD Import Module functionality is not installed.
Note: CAD Import Module functionality is included in the Design Module and the LiveLink products for
CAD''.

Now, I am not sure if there is simply a feature (Add-in) that needs to be activated or added to my current version of COMSOL (5.2), or I should have installed a completely different COMSOL version which would have had the CAD Import Module feature, in the first place?

Your help will be really appreciated.
Alireza