Downloaded GitHub project wont use desired visual studio version

this project is open tournament downloaded from GitHub and it works but i cant open c++ classes from within the editor, it uses UE4 V4.25 and i have visual studio 2019 installed

whenever i try opening a c++ class it tells me to download an old visual studio version

I tried to switch the Source code editor but there is no options available just none

In other projects this source code editor option has many options like bellow, but this GitHub project doesn’t

Even when downloading visual studio 2017 it doesn’t use it and tries to get me to download it agin