If your version of the program is 10 and above, just click on upgrade and double click on the program once the download is complete. Follow the instructions until it is finished. If your version of the program is any version of 9, then follow these instructions carefully: Upgrade info for pre 10.x versions 1. Backup database locally and on external drive (like a usb drive) 2. Uninstall previous version 3. Install latest version 10.x (do not install sample database & do not run program 4. Click on start, programs, ACS Check Cashing System, database Maint 5. Restore Database backup 6. Click on update database to ver 10.x 7. Open the program and start using it