How to change default file manager in Recoll?

Hi.

In Recoll, if I Right Click on a result and select Open Parent Folder, it asks me what fm to open it with. The default is Dolphin. I'm on MATE so don't use Dolphin. I get a dialog box but don't see any way to edit the options.

I looked around some config files in .recoll and in .config/Recoll.org but nothing stands out.

Any ideas, anyone?

Thanks.
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