Sansa Clip+ Firmware Update 01.02.18

hi, i recently tried using Rockbox but didnt like it so i tried switching back to the original firmware. i downloaded the latest version, formatted my player and tried installing it manually following the instructions. when i disconnect however it is saying file not found and plug usb cable. when i connect the player it the says Bootloader USB mode. can anyone help please? EDITED to say i did extract the file and it does read.bin