Extract the archive so you have the folder on your main PC or VPS.
Open assets/license.key and enter the license key provided to you.
Open assets/input/tokens.txt and paste all your Discord tokens, then save the file.
Open assets/input/proxies.txt and add your proxies (if you have any), then save the file.
When everything is set up, run Token Checker V1.0.0.exe.
This will display which tokens have Nitro, how much time is left, and how many boosts are used or unused.