When I view an HTML file on my computer, the height of my plugin is cut off 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.
If you are not seeing your Plugin at all when opening the file in your web browser, don't panic. This may be an issue with the security settings of your browser. Try using the iFrame code instead so you can preview your site with the Plugin on it.