Can't reinstall Mail Plugins

I’m having trouble reinstalling the plugins for DevonThink. I’ve followed the below instructions.

Quit Mail.
Quit DEVONthink 3.
Enable Full disk access in System Preferences > Security & Privacy for DEVONthink 3
In the Finder, hold the Option key and choose Go > Library .
Go into the Mail/Bundles folder and delete the DEVONthink.mailbundle .
Relaunch DEVONthink 3 and install the Mail plugin from the DEVONthink 3 > Install Add-Ons .
Relaunch Mail and enable the plugin via Apple Mail’s Preferences > General > Manage Plug-ins .

When I attempt to re-install the plugins however, it assumes the plugins are installed and the option is greyed out. I’ve emptied the trash as well. Any other tips?


macOS Big Sur version 11.6 version 14 (3654.
DevonThink 3 version 3.8

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In your screenshot of the mail plug-in is not greyed out, but is not present at all. That suggests you are using the standard version of DEVONthink 3 rather than Pro or Server. Only the latter two support email however. You can check which version you have by selecting About DEVONthink from the menu. You will read something along the lines of Registered Pro Version or similar, suggesting which version you have.

There was a similar thread only a few days ago.

Well…that’s embarrassing. Upgraded to Pro and life is good. Thanks.

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