Thanks Meter 788
Join Date: Nov 2012
Location: Los Angeles, CA
Download the latest Asus firmware, unzip the file once resulting in another zip.
Copy that zip to your tabet and flash it in CWM (that you have everything you care about backed up off the tablet goes without saying, right?). That will get you onto the latest bootloader but also wipe your custom recovery.
Boot into fastboot, flash a CM11 compatible recovery.
Boot into recovery, do a factory wipe and then flash the rom.