I do not succeed installing MailHub on Mojave , Mail12, on one specific MacBook Pro.
(MBP2016, migrated from High Sierra)
On three similar machines the (installing of the) app works fine.
Mail.app keeps telling that the plugin is deactivated because of incompatible with Mojave's Mail12.
I finally manually cleaned the folders inside Library/Mail/Bundles (and later also in Application Support).
At starting Mail, I receive the error-message (although plugin is not installed, folders Bundles are empty)
Than installed MailHub
Permit access in Mail preferences
After restarting I again see the message that the plugin(s) could not be activated.
Help..., I'm so addicted to MailHub...