I recently upgraded to Lion and I had Adobe InDesign which is no longer supported. Problem is, I have several files I need but cannot open because it was PowerPC based. What do I need to do? Thanks in advance!
Assuming you registered your older version, you can retrieve the serial number by going to Adobe's site and go into your account. On this page, click the My products link in the right hand column of the first three. You'll be asked to enter your user account name and password. Once in, a list of all software you've purchased will be shown, along with their serial numbers.
That said, it really won't help you much. A PowerPC only version of InDesign means it's no newer than the original CS version, and won't be worth a cent towards an upgrade discount. To get CS6, you'd have to pay full price again.