I have version 5.83.3. The option to buy 5 moves for 6 gold bars are not available on my mobile phone. Unfortunately, I don’t have another device to play on. Thank you for responding to my comment!
For a very long period of time , the game would periodically offer extra moves (10, 15,20,25,30 moves) for 9 gold bars. I haven’t seen this offer in a few days. The levels that I am at, it’s impossible to complete without this offer.