To Clarify:
Start AssetX > go to Options > Paths & Files > Add Home Folder > browse to or insert the path to your TANE Editing folder > Ensure you have ticked Autoscan Folders > Apply.
How it now works, open the asset or assets for edit in TANE Manage Content, start AssetX and the assets files will appear in AssetX where you can then operate on them as normal.