Note: the beauty of the approach in this tutorial is that without changing Windows' default email program, you can use AOL Mail as default sender when right-clicking on web pages.
Tip: to change the default email sender after the fact, click on the "gear" icon (near top right), and choose "Manage add-ons". Select "Accelerators" on the left, and right-click on an email provider at the top; choose "Remove as default" or "Set as default":