How to add the Edwin Style to Musescore 3

I reset my Laptop and reinstalled Musescore 3.

I am having problems with the formats of my older files that had applied with the Edwin thing. I want it back but I don't know how to re-add that.

I made my files with Musescore 3 but whenever I open it, I says that the file was made with a newer version.

I don't want Musescore 4 yet because it's still pretty new (I think).

Does anyone know what to do?

Thank you!