Last Tested: Jan 21, 2019
As of version 5.10 the answer is YES!
The workaround pre-version-5.10 is:
- Convert the UDD to a LookML Dashboard Using the "Get Dashboard Lookml" option in the cog in the top right
- Paste it into a dashboard file and save
- Find & Replace what you need to change in the elements (tiles)
- Save and view the dashboard
- Convert it to a UDD by copying it to a space