About the old version SDK

hi,

 

I want to know if there are the old version sdk to download?

I have find the new version's demo is different from the old version's.  eg.  the training course " render to texture" is different. The old is not use the p-buffer, but the new have used it.  I want to download the old version, how can I get it. pls tell me, thk very much.