Change the file-manger Octave uses to open files

I'm using Ubuntu 20.04 which I upgraded from 18.04 it upgraded Octave from
4.2 to 5.2 but it's still using the old File -manager open window.  How can
I change this?

Image link below of Old file-manager
https://i.imgur.com/B5Zcp0a.png

The snap version of Octave uses this file-manager which is the one I want
to use.
https://i.imgur.com/NBJhecm.png

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"Knowledge may be the Key"
"But wisdom unlocks the door"
"Absolute Power demands absolutely nothing"

As the old maxim has it, you need find only one white crow to disprove the
rule that all crows are black

"The bourgeois today burns as heretics and hangs as criminals those to whom
he erects monuments tomorrow" ('Steppenwolf')

"There are two modes of being those in bliss and those seeking bliss,
may each step you take and each thought you make be made in a mindful and
blissful state."
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