Please answer this technical questions on aprwin

My operating system is Windows XP and I am currently using ARPWIN Version 5.0. I am using arpwin to verify the yearly percentage rates and reimbursements and to check accuracy. I am happy with APRWIN version 5.0 but they recently released APRWIN version 6.2. Now, my technical questions on aprwin are:
- Is it possible to keep both APRWIN version 5.0 and APRWIN version 6.2?
- If it is possible to keep version 5.0 whilst version 6.2 is already available, what is the procure to keep my version 5.0?
