NOTE: I started from a new game with 5 jewels.
1. Open GameCIH go to input number and type the number of jewels you have (for me - 5) and search.
2. Go back to game and train a dragon, complete it instantly by spending 1 Jewel.
3. Re-open gameCIH go to input number and type the number of jewels you now have (for me it is now 4) and search again.
4. REPEAT STEPS 2 AND 3 ONCE MORE.
5. You should now see an address something like 'tb: NumberOfJewelsYouHave' (for example mine is 'tb: 3')
6. Edit this value to you chosen amount of jewels, I chose 56,375 (totally random and not too high)
7. Lock the address for good measure .
8. Go back to game and click the menu or something.
9. BAZINGA! MORE JEWELS!