To restore a deleted model:

1. Click on your username
2. Click on the Library button (Blue and white buttons, NOT the link on the black header)
3. Click Recycle Bin (right side)
4. Click on the model you need to un-delete
5. Click on the Cut button on the left sidebar
6. Click on the Library button where the Recycle Bin button used to be
7. Click the Paste button on the left sidebar