Version 3.7
Exported V4 head .obj
Yes, export button. As you see I used it twice. 1 is the original generated morph and 2 is the mirrored morph.

Did you check to see if your exported FC head .obj is good. Import it into a blank poser scene as you would a prop. .obj and see if you even have anything. If you do, it should load as a proper head morph.

Another thing would be to export a V4 head, remember you just want the head and not all the other stuff that comes with the head like eyes an upper/lower jaw.. Then load that back to V4 head to see if a dial is created.

That may give us a starting point to find out what is going on.