The plugin is activated but it is not working

I have 3 issues I would like your assistance with.

1 – None of the auto update keys are working.
For some reason, in my downloads area I have been given 2 auto update keys. I have attempted to use each of them in the plugin and the response I get for both is:
Key is incorrect. Please get Auto Update key at https://villatheme.com/my-download

2 – The plugin is activated but does not work as expected.
I have the plugin set so when someone clicks the add to cart button the plugin will activate and display the popup. However this does not seem to be happening. Can you please fix this.

3 – In the discount / select coupon drop down there is no way to remove the coupon. I wish to have this field empty but i’m not able to do it. Can you please clear it.