I’m going to call this a bug, even though it is probably not technically one…
If you import an FBX file into an unsaved Touch project, and then you just save it, the path to the FBX (which has by now, most unfortunately, been converted to the “tog” format), is broken.
You then have to bring in the “import” folder from the desktop and relink.
It seems like Touch should be smart enough to move the files where you save them, or, even better, just maintain a live link to the FBX file, and not create a new file that cannot be changed anywhere else than in Touch itself…