You can reload any of the last versions by using the creative cloud menu. Next to the Open button in the Apps section there is a dropdown arrow... just select the previous version. I did this today as I was having hangs in the latest version. Note: you will lose all your preferences, so back them up beforehand. My brushes came through the downgrade, but my Workspace and Actions did not. Good luck
It would help if you told us what you think the bug is or the issue that you're having, please provide as much info as possible
If you want to remove Photoshop take a look here
Use the Creative Cloud Cleaner Tool to solve installation problems