DropBox driver is not bundled with Querona, and needs to be installed before use.
Follow these steps to install the Windows driver for DropBox:
Go to the CData website.
In the ADO.NET Provider Download section, select Download Trial or Download Full, depending on your use-case.
In the list CData Software - Downloads that displays, register or sign-in.
Download the ADO.Net driver and install the driver.