Please, send the dev plugin file

Hello, I hope you are well!
I asked a question in another post, regarding the Chrome extension not working, you responded with the text below:

Our extension just got updated yesterday, so you don’t need the dev chrome extension anymore, please ensure you’re using the latest version of it. And also please open a new ticket, I’ll send you the dev plugin file.

I didn’t understand well. Would it be the plugin or the extension itself? Could you send me?