I saw a post that suggests downloading and running a "reg" file to use Snagit in "software-only" mode in order to help video and audio stay in sync. What is a "reg" file and how does "software-only" mode work to help Snagit video and audio stay in sync? I downloaded the zip file for Snagit 2018, but I don't want to install it until I understand what it does and why and how it works, and whether I actually need it? I can't find an actual explanation for how it works and pros and cons. I just upgraded Snagit to the 2018 version on a Windows 10 Lenovo Thinkpad, which is a relatively new machine for me. I previously ran Snagit on an older MacBookPro.