Ignore the fact that you (unnecessarily) signed up to Easyupload.io. Simply click here
https://easyupload.io/4976p4
and then click the 'ordinary' 'Download' button (i.e. not the 'Turbo' download one). You can then save the crossword file to wherever you like on your computer (unless you've got your browser configured to automatically choose 'Downloads', or some other file location, as the place to send all downloads too). It's really easy, honestly!
With regard to the Telegraph, are you subscribed to the actual newspaper (so that you can read all of the news and features) or just to the Telegraph Puzzles site? What actually happens when you try to access the site? (i.e. what error message, if any, do you see?)