Visit the official Mercusys support page. Search for "MW302R" and select the "Firmware" tab. Ensure you select the version corresponding to the V1.0 hardware.
Ensure your power source is stable. Turning off the router during an update is fatal for the hardware. mw302r 1.0 firmware update
Once logged in, go to Advanced > System Tools > Firmware Upgrade . Visit the official Mercusys support page