As I've seen and I've experienced myself, the trainer supposedly does not work. However, as I quoted from MrAntiFun about how he fix the same problem he had and how he himself fixed it, I also did the same fix and it works for me as well, all of the options do. I also have proof that I took of my desktop with the installation folder open showing that I altered the DX11 exe by adding the "_b" at the end of the name of the DX11 exe's name. There are three snapshots I took, since I got the wallpaper for FC3BD for free through uPlay. But all three have the shortcut for my steam-bought version of Sonic Adventure 2 on the far right so everyone know these are my snapshots.
This is just the main installation folder before the next snapshot, the next snapshot shows the next piece of proof that renaming the DX11 exe by adding "_b" works, but not the final piece.
As shown, I highlighted the DX11 exe after I had already renamed it, showing that I did what MrAntiFun suggested. Now the final piece that I've seen mulitple people complaining about as well, apparently not caring to listen to MrAntiFun who takes time out of his days when he can to make great trainers for us is the final snapshot that the trainer does work.
As showing in the final snapshot I took, adding "_b" to the end of the DX11 exe for FC3BD then running said DX11 exe from the installation folder, after which then running the trainer, which I used the inbuilt windows snapshot program for all three, I circled around just under the picture of the game on the trainer, with the game running, where it says process name and whether or not the game is on. As you can see, performing that slight addition to the DX11 exe for FC3BD as MrAntiFun suggested, which I've done and have shown that the trainer now indeed works, do the aforementioned addition of "_b" to the end of the DX11 exe and you should have no problems getting the trainer to run anymore. As always, thanks MrAntiFun for another great trainer for another great classic, and thank you as well for providing the fix for the exe to make the trainer work. Good job and keep up the good work.