Please download the plugin both versions 4.25 and 4.26 here.
https://drive.google.com/file/d/1vsjDOcXFNUFvrolETn7M9dIDI5JA4KzO/view?usp=sharing
If you wish to use one of the portal example projects you will need to download the plugin and drag/drop the config/plugins folder in the project directory.
NOTE: Please see the Better Portals Readme.pdf for a full walkthrough.