Welcome to Android Central! You mean CM Browser? If you're referring to Cheetah Mobile's other apps like their launcher or security vault app, those were removed from the Play Store a while back (because Cheetah is a terrible shady company).
You can try contacting the developer for help. Otherwise, you're probably out of luck, unless they allow you to reset your pattern using some sort of backup method. PINs, passwords, and patterns are important to remember, because they're all about security.