Can't find my serial number for Photoshop Elements 9

Can't find my serial number for Photoshop Elements 9 which I purchased in a bindl with Premiere Elements two years ago. Now, after reinstalling Windows on my desktop I need to register my Adobe products again. They were bought by Internet. No disks or boxes. In My Adobe account there is the serial number for Premiere Elements and nothing about Photoshop Elements. How can I get my purchase again?