Yes you can use that device on the newer RV. Since you already have the tuning device, you would only need to purchase the email tune: https://www.ultrarvproducts.com/V8TUNE-UltraPower-7.3L-V8-Custom-Tune-(E-mail-Tune-Only)
You would not need to send us the device, it can be updated from your computer as long as you have a Microsoft Windows PC.