That's flashify.
You have to be rooted in order to use flashify and flash recovery.
I believe you can enable it from CM11 from developer options.
I may be wrong on the unrooting, especially for this tablet. I thought I did a factory reset once for something else and it lost root. I would try using the rooting tool, they usually have an unroot option. Otherwise, use LG's tool to flash a 4.2.2 stock kdz. See http://xdaforums.com/showthread.php?p=51466025.
You have to be rooted in order to use flashify and flash recovery.
I believe you can enable it from CM11 from developer options.
I may be wrong on the unrooting, especially for this tablet. I thought I did a factory reset once for something else and it lost root. I would try using the rooting tool, they usually have an unroot option. Otherwise, use LG's tool to flash a 4.2.2 stock kdz. See http://xdaforums.com/showthread.php?p=51466025.