TomatoUSB

I am trying to upgrade Tomato 1.28 from v 116 to v 124 on a Linksys E 2500 v2. I downloaded the firmware upgrade file tomato-E2500-NVRAM60K-1.28.RT-n5x-MIPSR2-124-Max.bin. During the upgrade, a message indicating an error in reading the file had ocurred, A button to go back appeared and I followed the instruction. After, a message saying "Please wait while firmware is uploaded and flashed, Warning: Do no interrupt this browser or the router! I am trying to upgrade from v 116 to v 124 on a Linksys E 2500 v2. I downloaded the firmware upgrade file tomato-E2500-NVRAM60K-1.28.RT-n5x-MIPSR2-124-Max.bin. During the upgrade, a message indicating an error reading file had ocurred, I followed the instruction and got a message saying "Please wait while firmware is uploaded and flashed, Warning: Do no interrupt this browser or the router!" It has been more than 90 minutes and still nothing happens, it seems to be on a loop or somehow unable to finalize, what can I do? I am afraid I will brick the router if I try to restart it.
The router seems to be working as I am still able to connect to internet through it even though the screen on the browser only shows the warning. HELP!!!