Can't set "Enable in-place mode" for refactoring in PyCharm for CLion

I am using CLion 2017.2 with the PyCharm Community Edition for CLion plugin.

In-place rename in python files was working fine. Somehow I have disabled it, so Shift-F6 on something like a function name opens the dialog immediately, and I can't figure out how to re-enable it. The documentation at https://www.jetbrains.com/help/pycharm/rename-refactorings.html refers to the "Enable in-place mode" setting under Editor -> General -> Refactorings, but there is no such setting in CLion. I see the setting in PyCharm, but changing it there does not affect my CLion project.

I guess the setting must be in a configuration file somewhere... anybody know where it is?!