The main difference from the old one is supporting the large size image more than 48MB.
Please see the detailed explanation of update as below.
1) Unzip the solo_cfe_2.0_usb.zip to USB stick. (There should be /vuplus/solo/cfe_cfe_auto.bin)
2) Insert USB stick into the USB port of solo and power on the box.
3) It takes just a few secs to update.
4) If solo's front led blinks continuously, restart box.
5) To proceed with image update, you should delete the cfe_cfe_auto.bin at /vuplus/solo in USB stick once bootloader update is finished.