This optional update isn't optional when you have a monthly subscription to DC and something has occurred since this update and today 10/29.
1. The program has a different opening sequence of windows than before that I am not worried about at the moment, what went missing thought between when this update actually took hold in my laptop and today is the "clear recent file" option is no longer available, NEED THIS!
2. DC is no longer previewing in windows explorer or taking forever to show a file image
3. Poor performance, freezing or crashing not sure what you call it but while trying to open files the program is taking a long time to open particular files, twice now just hung up for about 2 minutes.
I haven't had issues in the past with DC so I am a little concerned with this update. I use the program frequently enough that I know when it's "sick" and it has gotten sick with this current update.
As per the issue description mentioned above, you want to locate the clear files option in Acrobat as well as unable to preview pdf files in windows explorer, also Acrobat is crashing when viewing pdf files in Acrobat, is that correct?
You can clear recent files by locating "remove from recent" in the right hand pane by selecting a file or multiple pdf files under "Recent" tab. Below are the screenshots:
Also, you mentioned, Acrobat is freezing and unable to preview pdf files in explorer, could you try installing the latest patch for Acrobat using "Check for updates" option under "Help" menu, reboot the machine after installing update and try again. You may also download updates from here: Adobe software and product updates