STEPS TO REPRODUCE
1. Launch iClone 6
2. Launch 3DXchange 6, apply prop content
3. Go to Modify panel, click "Apply to iClone" button, the prop content can be sent to iClone 6
4. Click "Apply to iClone" button again

ACTUAL RESULT
Failed to sent props to iClone after applying more than once

EXPECTED RESULT
The prop can be sent to iClone more than once