Here’s how to reset the preferences for unrealBook.
Locate the settings app on the iPad
Open the settings app and scroll down until you see unrealBook, then press Reset Preferences.
Now you need to force quit unrealBook. Swipe up from the bottom of the iPad to enter the multitasking “card” page.
Once in the multitasking card page, locate the unrealBook card and swipe up until the card disappears. This will quit unrealBook.
Run unrealBook again. It will show that the preferences have been reset.
Go into the Do menu and turn on Set List mode.