You can click to download the OpticutGridDesigner program (For WindowsOS systems)
Once downloaded , create a folder on your hard drive, and extract the file contents. Find the OpticutGridDesiner.exe file and double click. On first use, contact Opticut Tech to receive the key code.
Some browsers will block the saving of certain files, zip files included. You should click to allow, if you want the program.
After that, enjoy