A few weeks ago (Nov. 2015) Avid released an update to Eleven Software called Eleven MKII.
It was updated to include everything Eleven Rack users received in the ERXP (firmware 2.0.x) update.
In this video I dive deep into the compatibilities and incompatibilities of the Eleven MKII Presets and the Eleven Rack Effect Presets.
First, Eleven Rack Effect Presets are NOT Eleven Rack Rigs. Rigs denote a FULL rig setting, meaning amp, cab, mic, effects, true-z, volume, ect....
As you see in the video, some of the MKII presets will load in the Eleven Rack, although they will reference the wrong amp/cab, which is easily switched. Others, well, they don't work at all. I'm not sure you will learn much in this video, but at the least it will give you a good grasp of how and where the Eleven Rack Effect Presets are stored.
If you need the Eleven Rack Editor