LR 2 stopped being sold somewhere between 2008 - 2009. So I don't see how you could of bought a copy in 2012.
If you paid over $600 then you didn't buy just LR as that has had the cost of $149.00 US for the Full version since forever.
Please check exactly what Adobe product you have.
You can't use a serial number for LR 2 on any other version of LR, IE it only works with Lightroom Version 2.
You can download all older version of LR from one of these pages depending on the OS version you are using, Mac or Windows.
hi there, this is my product info. I dont believe it came with any other programs but I do recall the price we paid for it (AU dollar) all i want is to be able to use my program again; if i cant download lightroom 2 how am I supposed to use a program that i paid for full version?
Product Name Serial Number Version Platform Registration Date Adobe Photoshop Lightroom 1160-xxxx-xxxx-xxxx-xxxx-xxxx 2.0 Multiple July 21, 2012