Hi, I wrote you a PM also

You need to connect your MT4 with your mql5.com account. Then you will be able to download your purchased products

Here is an explanation how to download a product into MT4: https://www.metatrader4.com/en/trading-platform/help/market

And here is a video: https://www.youtube.com/watch?v=M1lD90g9Rjg