@gidzzz:

after updating, i found option in setting for "open whole folders"... but... what does it do and in what way???

where is option to create pls from folder(s)???

EDIT: silly me, if i only just read a whole text form your previous post
better yet, check out my writings bellow
tested and it is working

also, it don't remember settings after OMP restarts...

"open whole folders" check-box is unchecked, and "size of automatic playlist" when changed is not remembered (showing blank field instead)

i think you should only put an option into "playlist" view for "playlist from folder", and when pressed, to popup dialog for selecting which folder to play music from! and when it generate playlist, to show it, with "shuffle all" button on top (like for all other playlist it generates/imports/etc) this is good if you have sub-folders with music...
consider that, i think it could be a best way (or maybe you had something other on your mind???)

needles to say, but: kudos to you!