How to Change DATA Folder for New Updates and Fixes

[sandroj22]

hello, I try to change a DATA folder, from a newer client (new interface) to a client with an old interface, but when I try to start the client it's error and when I also replace the index folder the interface gets all bug, I would like to know a way to change the DATA, as I would like to get some new updates like customs and new mounts. I appreciate it from now on!