Are you aware using preview on both of the format cause an Opus crash and it restarts?
Neither viewer is actually part of Opus. Opus can just use them in the viewer pane if they are installed.
You can disable Zip in the viewer pane by going to Preferences / Viewers / Plugins, configuring the ActiveX + Preview + Office + Web plugin, and removing Zip from the Internet Explorer line. (We might do this by default in the future as well, since it's not really that useful to be able to display zips in the viewer, and IE is very old now and probably doesn't support all the zip archive types that Opus itself supports.)
For the PDF viewer, you may find the same crash happens in File Explorer's viewer. Either way, you should repair/reinstall Adobe Reader, or try a different PDF viewer. It's not really anything to do with us.
Thank you, Leo
Acrobat Pro is installed and so is the reader version. I use read for viewing.
I could not find any Zip setting anywhere
I appreciate you getting back to me. I will look into your suggestions.
Thanks, I did not see that