Sorry to bother again. I found some bugs with the workbench itself.

The Refresh Meshes button doesn't seem to do anything. when i checked out the logs it seems to throw a null expection

NullReferenceException: Object reference not set to an instance of an object
at ModelEditor.RefreshMeshes () [0x00000] in <filename unknown>:0
UnityEngine.GameObject:BroadcastMessage(String, Object, SendMessageOptions)
PhysicalFuncTrigger:SyncView(Boolean)
PhysicalInputValue:SyncInputs(Boolean)
PhysicalInputValue:Set(Single, Boolean)
PhysicalInput:Simulate(Hand)
PhysicalInputButton:Simulate(Hand)
PhysicalInputButton:OnTriggerStay(Collider)

(Filename: Line: -1)

Also the drawers can't be pulled in non-VR as the hand goes the wrong direction :o

Model Importing and exporting does work still tho! I uploaded 2 models