I do wish people asked questions BEFORE doing the risky procedure. Upgrading a router incorrectly tends to leave you with an expensive paperweight.
You seemed to have left out a few steps. Did you:
a. Download the new firmware file to your laptop?
b. Disconnect ALL cables/wires (except power) from your router? Disable Wi-Fi?
c. Connect only your laptop/desktop to the router via an Ethernet cable?
d. Backup your current firmware? Yes.
e. Write down the config settings so that you can enter them again after the upgrade?
f. *Pray for 30 seconds, then start the firmware upgrade?
g. See if the upgrade completed successfully? Can you access your router's web portal? Did the firmware version change?
h. Re-enter your config settings?
i. Reconnect all cables to your router?