1. Click on "Manually Refresh Queue" in the Desktop App settings menu.
2. Log out of the Desktop App, then log back in.
3. Quit the Desktop App, then open it again.
* WARNING: unpredictable behavior may occur when more than 250 songs are added to the Crate at one time, or when more than 500 songs are in the Desktop App download queue at one time - it is highly recommended that users comply with these limits to ensure a smooth Desktop App experience.