[GNC] "Easy" way to revert to default Gnucash?

[Steve Miller]

I'm currently using Windows 11 and GnuCash 4.14.

Several years ago I installed a theme, something like leather dark, I
really don't remember which one or where I got it, it took me seemingly
forever to install it, I have zero memory of what I did.

*Is there any easy way to go back to a "clean" default install of GnuCash
using my current datafile?*