Pro-Stitcher downloads are often delivered in zip format. You’ll need to go to the folder on your computer where the download is located. For PC users, right-click on the zip file, select Extract All. Select the file type for your longarm and move that to your USB drive.
If the download did transfer to your computer but won’t stitch on your machine, you may have the wrong file type. Check your robotic system’s manual or use this Quilting System Reference guide.