Can't update Kotlin plugin in Studio 3.2.1

Hi all.
Trying to update Kotlin plugin from 1.2.71 to 1.3.11 with no luck

  1. From here kotlin

installs → restart → still the same version remains

  1. from here
    donload-plugin

updating → restart → the same old version appears

System is linux mint 18.3

studio
android studio works fine with no issues

Solved.
Thanx