Install with Kotli

I am a student installed Android Studio for the first time, chose Kotlin in the setup settings. My instructor wants Java. How do I change it?
I tried to uninstall but it keeps saying “welcome back” and keeps my original choice of Kotlin. HELP!!!

Appearance & Behaviour > System Settings > Updates. Here, both the current version and the build number are shown. While entering into the android studio project,On top of the Window you can see the version number.