When I view an HTML file on my computer, the height of my plugin is cutoff on the page.
Are you viewing a file on your computer in your browser without a server? The url would look something like this file://link/to/your/page.
Your plugin is probably installed correctly.
However, the powr.js file is not able to resize the plugin using the file:// protocol, so your plugin looks like it is cut in half.
Try viewing the page through http:// using a web server. If you have a local server, view the file through your server. Or move the file to your hosting provider and then view it in a browser.