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You can find a good article on moving your license service from one machine to another at the following link:
http://usa.autodesk.com/getdoc/id=TS1066086
That article also contains a link to the article which covers the usage of the environment variable to which Travis referred in his post. With regard to obtaining the new license file, you can visit www.autodesk.com/register, or you can call the Activations & Licensing department at 1(800)551-1490.