I have read that deleting objectsimported in Home is quite easy. "B" button, Click "Remove Upload", close Oculus, go to _Import directory, manually delete the objects, restart Oculus, go to Home, and voilà, object(s) no longer visible.
There is one problem with that. It does not work.
My son created huge objects in Medium, imported them in my Home. I removed the objects in Home, did the "Remove Upload" trick, waited (in fact a few hours, not just a few seconds), deleted the objects in the _Import folder, emptied then deleted the very Home it had been put in, searched all my HD for the file ("zach") (deep search, with research extended to hidden files and the content also), even searched the Registry. To no avail. Restarted Oculus software, restarted Windows. The object is still there, in my inventory, each and every time I return in Oculus. Where is the damn file on the disk? Or the setting? Should I uninstall all and everything? Why is it so... persistent?