I don't know when exactly the update hit, but I know we've been selling the updated version for a while now. I have not taken one out to try out, nor have we received any feedback from users. From what I gather, there is no way to tell about the update from external appearance.
Based on the discussions we've had regarding the gain of the E7 in this forum, whether "a few to several" dB of boost is going to work for you really depends on your specific application and what you are looking for. For most people, the update would not bring about any practical differences during daily use.