Go to your Galaxy Wearable app on your phone. Open it and click the 3 lines on the top left corner and then click on About Wearable. You can get the update there.
After you install it... takes awhile. You can go back to the Wearable app and then click on Apps and the ECG will show up. Add it to your watch and then open it and follow the prompts.
Nice of them? No, they should refund us some of what we paid since our GWA2s do not have all the same features that others have. This is the last time I buy a smartwatch from Samsung.