I think there is some confusion somewhere with your question.

Plugins are effects or processing done on a track in a DAW, like EQing a vocal or Compressing drums. I think you are referring to patches or presets, these are the block arrangements of effects and EQ along with the amp and cab and the relevant settings that reside in a storage spot in the eleven rack (ex. "B3" means the "B" bank in the "3" slot).

Are you asking about plugins for a DAW or user-created presets for the eleven rack? The eleven rack has no plugins..