Setting to change rename behavior?

I'm trying to rename a class, but the IDE keeps blocking me, complaining "occurrences found in comments, strings, and non-code files" and I want to disable that behavior.

I've read in another message that you can change the default behavior if you press SHIFT-F6 twice, but I'm running linux on a chromebook and the function keys don't work properly, so I can't use that method.

Is there something in the settings to change that behavior?