This set of shortcodes is a lifesaver! The template I was using lacked a lot of features I needed. The support is the best, they went above and being what could be expected to help me. I highly recommend this product and this seller.
A common problem people have is that they will try to install the zip file directly downloaded from CodeCanyon.net. However, the zip file from CodeCanyon.net includes the plugin install zip, documentation, example templates, example snippets, and more.
Please make sure to install the intense.zip file found within the downloaded file. If you are installing the intense.zip file and still having problems, most likely your PHP settings are set too low to allow the ZIP file to upload. Specifically, PHP is configured with a maximum file upload size limit at 8 megabytes or less. The plugin ZIP is about 13.2 megabytes. Because of this, the web server is rejecting the upload. To fix this you can either increase the limit or install Intense using FTP.