In Opus 12, you need to make the change and then go to Folder > Folder Options and click Save. That will let you save the change for that folder/path.
Or, if you want that change to apply to ALL folders, see here for how to do that. (Basically the same thing but you choose a different option after clicking Save.)
In Opus 13, things work more like Explorer by default: If you go to a folder and change how it's displayed, that will be remembered for that folder automatically. And you can set the limit on how many folders or remove particular ones from the list (or promote them to saved formats) via Preferences.
(That can also be turned off, for people who want changes to remain temporary unless they explicitly save them.)