I can only find two formats in import/export I can only find two formats in import/export: Collada &amp; Alembic.

I've checked the add-ons; all the add-ons like fbx, obj (wavefront) are turned on but still not showing in the import/export box. How do I get them to show up?
I just had this issue, to fix it I had to uncheck "Filter Add-ons" under the first tab in the outliner.

Maybe its the answer but could be something else, hope this helps.