The software doesn't have a menu. You just press the plus sign to add items and then the bin icon to delete them. There is nothing to configure in the application. I've used my Android phone and installed the application in hope to find a menu, but it appears there isn't one available.
Use the following link to reach the official page: https://play.google.com/store/apps/details?id=jakiganicsystems.simplestchecklist
If you have any questions, forward them to the developers using the following menu: