Re: Transferring Adobe programs to new computer

For LR, you’d need to download and install perpetual-license version not the cloud version.  You can download this from the Adobe Updates page, and be sure to uninstall the cloud version, first:

http://www.adobe.com/downloads/updates/ 

CS3 downloads are available, here: 

http://www.adobe.com/downloads/other-downloads.html

For a CS6 serial number, if you registered it with Adobe, then you can find it under Manage Account after you log into adobe.com, and if not you may be able to get Adobe to help you with the Chat option:

https://www.adobe.com/account/my-products-services.html