Does the save editor work? Save it to local in the game, load it into save editor, edit number of coins, save to local in the editor. Load in game , number of coins still at zero. What gives?
Are you playing on android or browser? If you're playing on the browser, open the web development interface and switch to the console. Type in "pc." and following the dot operator it'll enumerate a list of variables and functions you can play with. If you edited the save file via a text/json parser and it's saying it is corrupted just type "taintedSave=false" in the console, hit enter and save over the once 'tainted' save file. If you're playing on android, see if you can export/import your save files, you literally won't find a trainer/save editor more powerful than the web development kit as not only can you alter functions you can change variables and flags in 'realtime' (as opposed to saving and reloading). You can create brand new functions and alter the vary nature of the engine (assuming you're willing to deobfuscate some poorly written code that's chewed up and spit out of some sort of code conversion process [it isn't too bad to understand, just very poorly done and pretty ugly]), of course that is assuming you want to extent COCII some how, you could not bother and just cheat for coin "pc.credits=(512*10**6)" will give you 512,000,000 coin.
delete flag.[name of event] if you wanna try a one-off scene a few times you don't know the name to, or wanna swap brint/brienne again flags are your go to [the world is your oyster] . Hell, you could just type the scene in and cut straight to victory/defeat sex scenes of your choice*.
*On that note: anybody knows the name of the scene with the centaur and female gnoll, I kindy wanna know what happens if you loss first hand.
Summarized:
Ctrl + Shift + I = To open the web SDK on chrome based browsers
click on console and enter
"pc.credits += 50000", to give your self an extra 50k coin
"pc.addItem(ITEMS.[name of item])" to give yourself an item
type in "ITEMS", hit enter and click on the small arrow pointing to the right just below it , it'll give you a list of items you can give yourself.