I am attempting to swap out the download key in both the global config options section as well as direction in the extension manager interface. Everything appears to function as normal, however upon refresh I can see that the old key is still present and that the new key is not. This is preventing upgrades as the old key is, well, old and gone. 😁
Happy to provide access to the site if that would help you.
Can you give me (super) admin, (s)ftp and database (PhpMyAdmin) access so I can take a look?
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