Hi,
There is a file called 
templates.ini that holds all of the label template dimensions for AudioLabel (including the custom templates you created).
When you install AudioLabel on a new computer, the 
templates.ini file does not includes your custom templates. If you have access to you old computer, you can copy the 
templates.ini file to the new computer. Here is a link which describes the folder location of the 
templates.ini file:
http://www.audiolabel.com/forum/viewtopic.php?f=2&t=225If you do not have access to the old 
templates.ini file, then you would need to recreate your custom templates.