The parts from SnapEDA are only supported by Proteus 8.8, which is available to registered users from a link within Proteus. You can try to update to the latest version and then import the parts. Here is a video that demonstrates the process: https://youtu.be/Bd3cxOXizEE
If you have any questions, just ask. We're here to help!
Answered 2 months, 3 weeks ago.