There are no options to change location, since the add-on is entirely IP based. The location it gave for me is several miles away on the other side of a ridge, and the weather is considerably different (hotter and dryer) than where I live.
There are "for pay" options that would include weather alerts, which is something most other add-ons offer up front (since they're kind of important).
It doesn't allow other locations to be added, either. It may be a work in progress, but it's not ready for prime time.