Apologies for the late response and also for the frustration & difficulties you faced with the new Adobe Express. Do you still see the issue of being able to launch the Adobe Express application? Have you tried using the other suggested browser, such as Microsoft Edge, to see if it makes a difference? Try clearing the browser's cache and cookies to check if that helps.
Also, try restarting your computer.
From Windows browser: Ctrl + Shift + Delete
Hard refresh: Ctrl/Cmd + R.
Please let us know if this helps. It also helps us with a screen recording of the workflow to investigate further.