Qlik Sense does not have an "automation" interface like QlikView does. But it does have a number of APIs and integration options. Can you describe what you are trying to do in terms of the business and user experience? We may have some suggestions then.
Yes, that's possible with Qlik Sense. You'll use an extension that can receive commands from Alexa and than take action -- like make selections. Here's video of an Alexa extension I made a few years ago (source is no longer available). https://www.youtube.com/watch?v=1LT1XJc5zpw
I wrote a server that scraped the Todo list in my account and put the commands on a queue that my Qlik Sense extension was listening to. Since that time the Alexa "skills" API has become available so you no longer need to hack the Todo list.
I see you've also been looking at Adam Cooke's extension Qlik Branch. Hopefully Adam will respond to your question about the download problem.