Downloading Toolkit for CreateJS

[Moderator moved from Flash Player to Animate.]

I am still animating on Flash Professional CS6, and am perfectly happy with it, but want the ability to convert files to HTML5. I want to download the "Adobe Flash Professional Tookit for Create JS", to this end. When I open Adobe Extention Manager, to download the Toolkit, this is the screen that I am shown:

Don't know if you can read all that small type, or not, but the bottom of the screen describes the "Toolkit" as something that would do exactly what I want. I am not familiar with using Extension Manager, though, and am concerned that if I click the "Install" icon at the top of the page, I may actually wind up deleting the Flash Professional application, which has a "Remove" button to the right of it. So- dumb question- what do I do/click on here, to install the Toolkit without dis-installing Flash? And will the Tookit still work in 2021?