This page explains briefly how to use Export2Canvas. Basically, just do this:
Enter the desired Title and Resolution of your game.
Enter the desired Output Path (where all the HTML and JS files will be put).
Wait for the progress bar.
If there were no build errors - go ahead and try your game in the web browser. You will need a web server (can be a local one) in order to do that. For a local web server we recommend using Apache or XAMPP (which is basically Apache). Opening the index.html directly in your browser from Windows Explorer won't work as the browser has restrictions on loading files directly from the file system for security reasons.
If you do have build errors - try to work them out on your own or contact us for help.