"Please navigate to settings page and click Regenerate attachments button"
WPDiscuZ 7 update seems to have gone through just fine including multiple "please regenerate X" steps except this one:
"Please navigate to settings page and click Regenerate attachments button."
I can't find this option anywhere. Surprisingly, when I search for it using the "Find an option" search box, it "finds" it but clicking search result does not bring it up.
Do you use wpDiscuz Media Uploader addon? Please update it to the latest (7.0.x) version.
Also, navigate to the Dashboard > wpDiscuz > Settings > Comment Content and Media admin page find and click on the [Regenerate attachments] button and check again.