This may be a bit stupid (I myself thought so, because I didn't notice it sooner) but you could add this also as a solution on the troubleshooting page.
Now, what you do is the following:
1/ right-click desktop
2/ click on AMD switchable graphics (something like that, I expect that users can figure it out themselves)
3/ next you look at the bottom of the new AMD window where you see something similair to this:
you probably want AMD to tell you which applications are running in which mode (energy saving = standard graphics, high-performance= radeon or whatever you have), so you select the option that says something like this: "give a warning for programs that are not assigned".
what you also can do is search for the program yourself, well this you can't see on the screenshot right now, but it's in the bottom right. click "search" or something similar and look for Roche Fusion. (you run it in high-performance mode of course)
Done! you can play Roche Fusion now!
