After installing 2018.1, Kotlin isn’t supported in...

# intellij

[s1m0nw1]

After installing 2018.1, Kotlin isn’t supported in the IDE anymore, files are shown as simple text, “Kotlin” isn’t listed in Settings->Languages&Frameworks

What did I do wrong?

[christophsturm]

maybe you have an outdated kotlin plugin installed? what does tools/kotlin/configure kotlin plugin updates say