I'm having an odd issue regarding this particular trainer. When I boot it up, it shows the splash screen that usually shows before the trainer opens up, but most of the time, no trainer gets opened. Very rarely does it open, but on the times that it does, it disappears from my taskbar and active tasks once the game is opened.
dotnet.microsoft.com/download/dotnet-core/thank-you/runtime-desktop-3.1.2-windows-x64-installer
dotnet.microsoft.com/download/dotnet-core/thank-you/runtime-desktop-3.1.2-windows-x86-installer
Install both, then reboot, then try the trainer. Should be good to go.