In addition to what the fantastic Chris posted above, all of this information is available in the community or the support website through the search tool. 
For example, this post explains why it happens and how to resolve it: My antivirus marked WeMod as a Trojan - #2 by Ravenfyre
I also own games that do not have trainers, and that’s fine with me. The system of getting trainers made is a democratic one. And as with all democracies you don’t always get what you wanted, but nevertheless have to respect the results as it’s what the majority asked (or didn’t ask) for