Desktop app

Desktop app does not open in my Mac 10.15, i have cleared cache, reinstalled several times, send to apps folder and delete the installer but when i open it, send me to browser, when i click login, open a window with different browser options and the option to open in desktop app, which does not work. Even if i select a browser, then ask me for update, and makes no sense because i use chrome and safari perfectly fine. Someone else? please help