If you previously owned ERP 2.0, your iLok license automatically works for 2.0.1. You do not need a new license.
When you install the Expansion Pack, your Eleven Rack firmware is upgraded to version 2.0.1. Without this update, your unit runs on the legacy 1.0.x stock firmware, missing out on over a dozen classic boutique tones. Key Features and New Models in Firmware 2.0.1 eleven rack expansion pack 2.0.1 firmware update
The 2.0.1 update expands the sonic palette of the hardware significantly. 1. New Amplifier Models If you previously owned ERP 2