The trainer simply crashes the game for me every single time I try to load a game or even create a new game.
Tried all the things you asked to do, disable anti-virus/firewall, start as administrator both apps even downloaded the game and trainer several times.
The game got updated on March 20 to v1.31 which likely broke the trainer (again). But before you report it please whitelist the trainer exe in your AV/other security software or temporarily uninstall your AV completely.
Other than that please use the update notification system to report a game patch, update or to report that the trainer may not be working with the latest version of the game.
Link
Keep in mind that it needs at least 3 reports until the trainer gets reviewed.