Packrat plugin problem

I’m having a problem with a grasshopper plugin installation and it would be great if you can give me some insight to this problem. I’m trying to install the plugin called packrat as seen in the image. However, when I open a file using this package a unrecognized pop up showed itself saying the plugin is not installed.

Hi,

Packrat 0.6
2018-May-03

Evaluation version completely works fine for me. Check again.

Note by developer : I am unable to support the commercial version of Packrat, as such it will no longer be available for purchase.

Cheers,
BVR

OpenNest has boxpacking as well:

Found the solution: When downloaded the .zip, right click on properties and under general there is a prompt to unblock the file. Afterwards extract and add file to the appropriate folder and it viola.