I think it worked for me but just want to double check (Running Solus Budgie).
I updated my system first then restarted. Then I followed the instructions in the first post, logged out then logged back in. All seems well but Gnome Files still seems to be the default file manager. Is this expected?
Also when I open something from the desktop (e.g. my home folder) it doesn't seem to be Gnome Files that is used to display the contents. Is this an issue or expected.
Also also: is there a way to set it so that i have to double click to open something from the desktop? My googlefu failed me 😅 .