[Zubersoft]

Right-clicking or long pressing on a letter in the alphabet list should pop up a list of letters. Clicking on a letter will allow you to continue drilling down to find a song title that starts with all of the selected letters. You can also change Settings->Library Settings->Show Extended Letter List with Tap if you prefer using a single tap instead of a right-click or long press. If a long press is not working for you, something unusual is going on with your device. Can you long press anything else in the app? 

Mike