Refactoring not working for Perl in Komodo 8.5

I have not been able to use the Refactoring feature to rename a variable in Perl program files in Komodo 8.5. I was able to use this feature in my previous version, though I forget what exactly I was using. I have tried highlighting the target variable and selecting “Rename Variable” from the Refactoring right-click menu and I have also tried using the “Ctrl-K” keymapped sequence. I simply get no response. The keymaps I am using are default with no customization. Any thoughts on what might be wrong and how to fix it would be greatly appreciated.

I am using LinuxMint17.1 and Komodo 8.5.

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