The upgrade instructions here:
https://confluence.atlassian.com/doc/upgrading-confluence-4578.html
state to check the compatibility of your add-ons before upgrade. And that the update check tool should be at the bottom of the page after going to Settings->Manage Apps (or on the Confluence version we're using we suspect the equivalent is Settings->Add-Ons):
"scroll down to the Confluence Update Check to check the compatibility of your Marketplace apps."
But it's not there on version 6.6.0
After some googling, the next best article I found was this:
https://confluence.atlassian.com/upm/checking-app-compatibility-with-application-updates-273875705.html
And it said in Settings->Add-Ons to:
"Click (Product name) update check from the bottom of the page. For example, this might be Confluence update check or JIRA update check"
But again, there is no such thing at the bottom of the page on Confluence 6.6.0.
In short, where the heck do I find the Confluence Update Check feature in Confluence 6.6.0? Also, can the documentation be updated with perhaps some screenshots and/or more descriptive/accurate description on where to find this feature in 6.6.0?
