Using PHP 5.2.17 in Acquia Dev Desktop 2
They dropped PHP 5.2 support with DevDesktop 2. It has hit EOL so you really shouldn't be developing against it. 

That said, if you really want to do this, you can find old versions of DevDesktop that used PHP 5.2. I would guess you might hit problems if your end goal is to deploy to AcquiaCloud.