Round Robin - Tennis

This app worked great for me this past summer. Very upset that I paid money for this app and now it no longer works. When I press matches the app shuts down

The options to select, name, assign gender, select game based on gender are all good. Including ability to join/unjoin ans apply names. The algorithm to select pairing is horrible. I ran a test for free matches on four courts with 21 players - typical for my club. Twelve players played in seven games and two players played in only one game!! That makes this app a unusable.