Right-click on one of the files in question and choose "open with".  Select the box that indicates "always open with" and then select the application you want to open the file from the list (or search for it if it doesn't show up in the list by default).  
Not sure if I can correctly ask this question.  (Don't roll eyes, yes, I am a female and grandmother).   I d/l patterns and designs for my embroidery machine and Cricut machine.  They should be PES and SVG files.  Yet when I d/l the designs it stores in files as a PDF file. I think what happened was at one time a box appeared and ask if I wanted all files like this to be d/l by Adobe PDF, and I clicked yes!  Now whenever I d/l a new design of PES or SVG it saves as the PDF file. How can I correct this.  I have a XPS 9550 Thank you
Incorrect file type after download