1) You need to have the XEP Core Wallet downloaded, installed, and ran at least once. 2) Go to your XEP folder (Windows: C:/Users/YOUR_USER_NAME/AppData/Roaming/XEP - Mac: ~/Library/Application Support/XEP - Linux: ~/.xep). 3) Inside the XEP folder, you will have the wallet folder that needs to be replaced with your backup copy. 4) Make sure XEP Core Wallet is fully closed, then replace the wallet’s folder. If you have another wallet with coins you want to use, you can merge the two folders. 5) Restart the XEP Core Wallet and allow a full sync to occur to see any coins you had in the previous wallet. Please be aware that a full sync can possibly take a considerable amount of time.