If you are using a subscription you need to have the CC Manager installed.
That's not true. You can remove the CC Desktop app with the CC Cleaner Tool and everything works fine except the ability to update to new versions of applications. Minor updates are still handled through the older AAM method, so, so, so much better. When you need to install a new version of an application, you will unfortunately have to install that POS, malware-like, irritation called CC Desktop. Just run CC Cleaner Tool again afterwards to rid yourself of it.
CC Desktop is a total piece of junk.
Here is the CC Cleaner Tool. Make sure you only select the Desktop app: