To extract a report from Insights you open the report that you want to extract.

And then press the three dots in the upper right corner 

Then press either "Download pdf" or "Download Image"

Download PDF = The whole report is downloaded as a PDF to your computer

Download Image = The whole report will be downloaded as a PNG to your computer

You can also extract a single widget from the report if you don't need the whole report. And that gives you another option for the table widget. And that is "Download csv" This option is only available when downloading a "table widget"