Bad news. Your suggestion didn't work.
I was beyond happy to see the very left value.... but when the game loaded again.... Nothing changed... BUT GUESS WHAT?
Your suggestion led me on the right path.
We don't have to alter the reward value at all. We can literally alter the value directly because for some weird reason all of the encryption is void when in adventure mode...
So we start with a d word fuzzy search.
Then after it's done we need to attain whatever loot we are trying to manipulate.
For example I grabbed 33 coins
Since I grabbed 33 I put 33 and select top left option N = O+D
You will get alot of results. Do this again.
I grabbed 45 this time so I repeat the procedure
This got rid off all the values and left me with the coin value.
The coin value is high because I did this before. Just change the coin value to whatever you want.
In this example I used 50,000,000
When I went back to the main menu it saved. I exited the game, re opened and it was still there. Bingo! I'm not sure if this works for other currencies, but why wouldn't it. I assume with this same method you can manipulate whatever you can loot.