Sansa Clip+ Firmware Update 01.02.16

I have totally messed up my Sansa Clip+ while trying to install Rockbox. Is there any way to get a fresh new start with original firmware? Sansa Updater does not recognize the player anymore. I have tried to update manually, have copied clppa.bin to the root directory, but after unplugging the USB-cable nothing happens. When the cable is connected, there appears text “Bootloader USB mode”. When I disconnect it, it says “file not found” and “Plug USB cable”. And when I plug it, nothing happens… and so on.