Whenever you make a change to your libraries files and you want to see the changes reflected in Ubooquity immediately, go into the Ubooquity Admin > General > Content Scan section and click the LAUNCH NEW SCAN button. This will refresh the database with your changes. Obviously, depending on the size of your library and speed of your hardware, this could take a little while.

While you're in the Admin dashboard, you may want to change your "Automatic scan period" intervals and/or check your "Scan collection at launch" option.

As of October 13, 2019, the above link is still active for those of you who would like to check out this theme. 

Dropbox link to the file. I grabbed this in August of 2016 while the link was still good.

https://www.dropbox.com/s/scxsc8hkmcj8ltb/material-1.7.0a-theme.zip?dl=0