Customise Caja Image Resize Presets & Change Default Save Option in 22.04

Hi. Previous to my upgrade from Ubuntu 20.04 to 22.04, I could edit /usr/share/caja-extensions/caja-image-resize.ui to add/remove presets, for example to add 2 entries before the 640x480 preset:

<item>500x500</item>
<item>600x600</item>
<item>640x480</item>

Also, in the same file I could change the default Save option from "Append .resized" to "Resize in place", by replacing append_radiobutton with inplace_radiobutton.

All of this worked fine until the 22.04 upgrade, and while I just figured caja-image-resize.ui had been replaced by a default copy, and overwriting that with a backup of my customised version would fix that, it seems this file is being ignored. So does anyone know which file now contains these settings? I've look around everywhere, but can't can't locate it (/usr/lib/x86_64-linux-gnu/caja/extensions-2.0 just has a bunch of .so files, and /usr/share/caja-extensions just has that one file that isn't being used).

Many thanks in advance.