To make a change to an existing subscription, such as an address change for the Origin location, follow these steps.

Go to DispatchBot, hover over the subscription trip and select "Edit Trip".

In this example, we will change the "Origin" address.  Enter the new address information...

Scroll to the bottom of the page and from the "Apply changes to" drop down menu select "The entire series" to apply the changes to all new subscriptions.

Then click "Update Trip".