if you delete assets tdx & assets.bku , this may do it ... IDK.
IDK if you delete your 06 Local file, possibly that will force a rebuild.
Get some more information from others first before you attempt this.
Possiby by searching "Built In" and clicking the "Built In" =/= button, this may display all the "Non Built In" assets ... then highlighting "Select All" / "Delete" this would delete al the "Non Built In" assets.
But if you are "really, really sure" that you do want "ALL" your own routes and assets to be wiped out ... an uninstall/reinstall would do this.