Just downloaded this hack last night. And after messing around with it for a few hours I can say it does work.
I used Admin App to downgrade the game to vr. 1.3.0. I had to restart my game ( erase my previously saved data/saved game) for th hack to take full effect. After doing that the EX, K-gems and Energy hack worked perfectly. Story progress was working fine as well.
I then wanted to see if I could upgrade the game and play it while still keeping all the XP, Gems and Cash. And it some what worked. When I upgraded the game, all the gems and XP transferred over and I was able to buy everything. However I didn't get very far in the story mode so a lot of things were locked and I was unable to progress in story after.