If you are working with one of our partner organization then you have full access to Self Study courses in Pega Academy. The current version used now is Pega 7.1.9 to appear for CLSA Part 2 Exam.
You can login to PDN using http://pdn.pega.com. Go to Academy menu -> Choose My Self Study menu option -> Choose Course Library menu -> Choose by products -> Choose the Lead system Architect 7.1 course -> Enrol to the course -> Choose the lesson "Downloading the exercise system" -> Download the VM having the version Pega 7.1.9 within it. Extract the VM using WinRAR tool and keep it in a folder.
Now all our VM is using Virtual Box to run. Please install Oracle Virtual Box 5.0 in your system and use it to run the VM. Please use this to practice for the exam.