Mail plug-in for Mac

When I upgraded to Mavericks on my Mac I got this message:

Incompatible Plug-ins Disabled

Mail has disabled the following plug-ins:
DEVONthink Mail Import Support

Contact the makers of these plug-ins for versions that are compatible with Mail 7.0 and Message 7.0.

This happens every time OS X upgrades come along. Dozens of prior posts in the forum mention the same resolution:

Close Mail. Reinstall the plugin from DEVONthink > Install Add-ons…