Weird situation, Unsorted Bookmarks folder still remains in my Bookmarks.
Maybe because you have content on it?
Yes, but @Lashuaoo too, he had all bookmarks there, and that's why he did the "trick"
Mmmm... ☕ xD
Also I have read from @Kmielczarczyk that:
Unsorted bookmarks folder is deprecated if there were no bookmarks stored there.
JSONEdit may be worth https://www.portablefreeware.com/?id=2393