transfer to pc

I have a Suunto Vyper, purchased in 2005. Many times, I have downloaded dive data since then, using the same dive computer, cables, and PC. I recently completed 15 dives from 6/19 to 6/24/17. I also had a dive in December 2016. I am using Suunto Dive Manager 3.1.0 in a Windows 7 environment...