Yes, it's gotten an update since the first trainer's release. Be sure to use the Trainer Update Notification form.
Fixed trainer willbe posted soon. Please note that it works slightly different on fixed trainer. Option must be active BEFORE activating a skill.
You cannot compare one trainer to another as they are all different.
Something on your side is blocking the trainer from writing into the newly created 'C:\Users\YourWindowsUserName\Cheathappens\Work' location. You have to exclude it in your anti-virus/other security software and run it with admin rights.