How to make the DQ Assistant disappear?

You can close the DQ Assistant at all times by clicking on the "X" in the upper right corner.

Then you can reopen the assistant by clicking on the icon in the "Home" ribbon.

If you would like to make the DQ Assistant disappear from the ribbon, right-click on the ribbon -> click "Customize the ribbon" -> remove the tick-mark next to DQ Assistant -> click "OK"