In order to program the VGA card you need to download the firmware file.
Plug it into your Windows machine while holding the BOOTSEL button
A new drive on your computer will show up for the RPI.
Drop the firmware file into the new drive and the drive will disapear. That's it, all done.
applevgaplus.uf2 is the firmware file for the Apple ][ plus computers
applevgae.uf2 is the firmware file for the Apple //e computers