Please dont worry! this software is still in evolution.
At current time, ivsEdits 2018 has been released only for professional users. There are several and huge improvements because we have moved the rendering engine from CPU to GPU but a lot of debug has been required skipping from ivsEdits 2016 to 2018 and we havent released the version 2017. The good news we are already working to a version 7 for 2019. We have planned to release ivsEdits 2018 v6 as free version very soon.
Roberto Castellano.