If you need help, ask the Nintendo DSiBrew Discord!
You need an Internet connection in order to update.
- Power on your device
- Open System Settings
- Go to page 4, then select "System Update"
- Select "Yes" when it asks you to connect to the Internet
- Select "Next", then agree to the important notice
- Once the system has finished the update, you will be on version 1.4.5
Continue to Downgrading to 1.4