StatTag cannot work without AppleScript access. Given the user is prompted precisely once and never again, it's difficult to let the user know they can't really use StatTag once they've denied access.
We need to do something where we detect the privilege has been denied and then provide some sort of help dialogue to let them know what they need to do (similarly to how BBEdit does it). We cannot intervene at all on their behalf.
http://www.barebones.com/support/bbedit/ODBAutomationError.html