For many Outlook users, the perfect tagging workflow is typing a comma-separated list of categories with autocomplete and hitting Enter. 
Today we released SimplyTag version 2.1.9.149, which supports exactly that. The QuickTag window now supports using a comma to either select an existing tag or create a new one. So simply type “tag1, tag 2, … Enter” and you are done!
Use the Check for Updates command to download the new version. Happy SimplyTagging!