If you lost the serial code, you can't purchase the upgrade version.
In case of a packaged product, the little sticker with the serial is inside of the DVD case.
We can't reissue your serial code if you lost the serial of the packaged edition.
In case of download version, the serial code is described in the order confirmation mail etc. arriving at the time of purchase.
If you are unable to find a solution in the Troubleshooting section, please use the Inquiry Form to submit an inquiry.