<p>Double-click on the extension you would like to rename and the following window appears:</p>

<img class="screenshot naked" src="http://www.tri-line.com/common/img/documentation/tim_professional/renaming_extension.png" alt="Renaming an extension" />

<p>Overtype the new name for the extension and then press the <span class="button">Save</span>
button. You can edit any other extension property in the same way,
simply overtype before pressing <span class="button">Save</span>.</p>