Company replaced the app with a commercial

This used to be a fun app. Now the screen is crowded with control bars that do not work, just invite you to buy the upgrade if you try to use any of the features actually advertised as part of the upgrade (most companies upgrade after initial support), so they have taken away the functionality of what we had. How about an "upgrade" back to the working version? Why buy an app from a company that takes it away?

Azieba about Night Sky, v3.0.1