In any case, Hexagon does not import or export FBX natively. And the bridge Hexagon back to DAZ does not save the bones and animations and morphs
You know Hexagon is only a modeller and a little bit old ? You can creating only Polygone (staatic objects) or you creating new morphs per tweaking , but important, without change the polycount . Therefore Daz bridge can not work with decimate from Hex.
You are here in the German board, perhaps you find more help on the english site.:)