Automatic: go to System Tools > Online Upgrade and check Online Upgrade. The router will download and install new firmware automatically.
Manual: download the firmware file for the ROUTERBE3600 from www.strong-eu.com. Go to System Tools > Firmware Upgrade, click Choose File, select the file, and click Upgrade Software. The update takes approximately 2 minutes.
Warning: Never disconnect power during a firmware update. Always verify the file is specifically for the ROUTERBE3600 model.