To where did my auto change file view disappear?

Sorry for a possible newbie question.
I recently started using DO, spent a great deal of time with the likes of dearopus.com.
After that, when I changed view from folder to folder, the view changed from details to thumbnails and back based on the folder content.
I had a bug with DO so I had to reset and did not know I manually hade to backup settings.
How do I get this behavior back?

You may just need to turn on Preferences / Folders / Folder Behaviour / Enable Folder Content Type detection for...

More details under Content Types.

Sounds like it, thanx.
Need some time to verify it is it to be sure