I have tried over & over & again with Blender latest, upgraded, Python driven, the whole verification steps... and it won't load a DirectX model saved with genuine 3dStudioMax specific options used by SD developpers. PandaX for Blender simply doesn't recognize their files. Thus, gave up on it months ago.
Sadly, it could have been the only FREE solution beside having to do tricky acrobatics with shareware converters (reasonably priced, MilkShape_3d comes to mind) and some proper resaving of a mesh with Wings-3d.
Sure enough, the very old gMaX is strictly a gimmick to promote Discreet's best... but seriously, what kind of freaky modder would spend 4000$+ just for a few ships?
That doesn't make us any less talented, artistic wise.
We simply do it all for free, personal use and indirectly provide supplemental value to a product we paid for.