Hello Leo,
as a convinced user - with a focus esp. on Dreamweaver - it hurts me that Adobe is not able to deliver perfectly running programs, so that this "crutch" the cleaner tool will become unnecessary.
That's why I initiated a thread "What's up with "Downloading, Installing, Setting Up"?" >>> https://forums.adobe.com/thread/1482526
Preran, a very qualified and dedicated employeea of Adobe's staff answered there: "Rest assured, we have a process in place to create reports for the top issues reported on Adobe forums and take them to the product teams for a fix. You will be seeing many improvements to the experience with the next version of the Creative Cloud. About why there isn't a more elegant way sometimes other than to use the CC cleaner tool, I will ask around and get back to you."
To accelerate the process I therefore call upon you to support my efforts. Most successful could be to click a „like“ in Prerans answer (see consecutive number 11)
Thanks,
Hans-Günter