I watched a couple of tutorials on how to download Optifine for Minecraft…
However, when I have downloaded the file, the Install window does not open, but I should select an app where I open the file… In this only the numbers and letters are shown to me, but I do not know my way around something like that
You need to have Java on your PC.
Do you have java installed?
So just the Minecraft Launcher
Ok, so not just the launcher?
You also need Java itself because Minecraft was generally programmed with Java.
Ok thanks you go now
I'm glad! Have fun.