When you download a customization, you will receive a Zip containing one folder for each customization side
Each side folder contains a “files” folder and the side SVG
The “files” folder contains images that are necessary for rendering the SVG file, mainly embedded images as well as the base and mask images
The Zip also contains a “fonts” folder containing the fonts that were used in the design. You can install these fonts if not already installed on your system.
Generally, after installing a new font, you need to restart the software in which you want to display the new font
The recommended software to open these SVG files is inkscape (free software).
You can export to PDF from inkscape for more compatibility with other softwares like Illustrator or Corel Draw