The currency hack doesn't seem to work because one has to load the game with the mod enabled which they can't because the modded game throws an error on loading, forcing the player to reload.
Someone has already given the previous version link but I'll clear this up anyway for information.
Have it this way, if you have downloaded an apk say version 3 & you have i's previous version install say 2. So the system will ask you to upgrade/update the application (before everytime I had to uninstall the previous & then reload all the data all the way for new version) but now you just simply update it.
Now you're trying to override new version with a previous version, you cannot "downgrade" it so it pops with an error message. You gotta delete the new to install previous