From our FAQ page:http://www.fsdreamteam.com/faq.html
I have lost my Email receipt, how can I reactivate my product ?
You can go to Esellerate support site here:http://store.esellerate.net/support
You can retrieve your Order History, by inserting the email you used to purchased the product, then press the "E-Mail Order History" button. Having your Order, will allow to use the server-assisted Reinstall. If you want to know your Serial Number, insert your Order Number and Email, then press the "Submit" button on the Esellerate support site: this will enter inside your Order Page, with option to see your original Email Receipt, that contains also your Serial Number.
There's also thread on this forum, covering a reinstallation on a new system, named "Reinstallation after system upgrade or crash, please READ!"http://www.fsdreamteam.com/forum/index.php?topic=649.0