The new v2.0 firmware for letcool n350jp is out, Buddies!http://www.letcool.net/resources/support.shtml
follow the link above, and there you go!
haven't tried it yet, but according to my friend, LR button issues is fixed, so is the frozen when bring out menu bug.
here is how it works
After downloading, open it up, there suppose to be 4 files inside the folder called "ISP文件
and copy all 4 of them into the root of your TF card(micro sd card).
Then, set TF card as defult. (though configeration menu)
last step, update it.
after updating finished, push the reset button, and then push power button to turn you letcool on.
there you go, enjoy!
PS: Please be patient when updating and turning on!