You have 2 options:

1. Get rid of McAfee completely. - This piece of code is not able to exclude a whole folder which is crucial for our current trainers marked as Trainer Manager Compatible. The folder is called Work and is located here -> C:\Users\YourWindowsUserName\Cheathappens\

2. Stay with McAfee. - You will find a file called work in the location mentioned above. Delete this file and you might be able to use this trainer but very likely need to perform this every time you boot up your PC and launch a trainer from us.