I think you need to subscribe on Patreon at $10 and stay subscribed to keep getting official versions with the cheats. Good news though, there are RPGM cheat mods you can download that are way more versatile than the included cheats in the $10 version. Bad news, you may have to do some tweaking to get some of those mods to work with RPGM MZ, which is what SKA uses.