I recently purchased a new Mac.  I copied Textmate along with the Application Support folder over from my old Mac.

Everything works fine.  I noticed that at the top of each editing window is a button called "Add License".

When I click this button it Shows my Name and my License.  However the License textbox is greyed out and the "Add License" Button is disabled.

Is there a way that I can re-enter my license so that this button goes away?