Extend Silence Plugin

I’m new to Audacity. I found a plugin Extend Silence written by Steve in June 14. I read the rationale for the development and it does exactly what I want to do ( insert the same silence [ say 2 seconds} multiple times in a voice file.) When I click through the links it takes me to a page that perhaps indicates that it is deprecated.
Is this still a working plugin or is there a new plugin that does this task.