Last November, I uninstalled MailTags 3.1 because they significantly slowed down my Mac. About  1.5 months ago Scott from Indev mentioned the release of MailTags 3.2. I re-installed them and have not experienced any issues ever since. I enjoy MailTags as much as before. If I decide to organize email, one of my favorite methods  is “filing in a hurry” with a combination of Mail flags and Mailtags.