game .exe will probably be useless as this game patches every single day, and the code being searched for is created with scripts at run time and in random memory and only when you do specific things.
trainer tested still working 11:54am TODAY even though the game, as usual, patched again today.
Same OS and it works 🙂
Major thing to not forget: Empty/clean your browser(s) cache before starting your trainer each and every time
It isn't you that uses your browser, but the game and the trainer!
CCleaner is good, but cleaning your cache from your browser is necessary.
Cheating in PvP is not allowed, you need to wake-up and smell the roses, I'm sure you would not like if someone cheated on you while you're not.
If you cheated on PvP, the developer(s) of Gems of War might already banned you silently.
In any cases, by following my suggestion you should be able to play with the trainer, in single-player mode, only.