A different way you can try if you want:
In Edge, goto the URL edge://version, take note of the "profile" path and Close Edge.
In Opera, goto te URL opera://about, take note of the "profile" path and Close Opera.
In Opera's profile folder, delete the "Bookmarks", "BookmarksExtras" and Bookmarks.bak (if present).
Then, copy the "Bookmarks" file from Edge's profile folder to Opera's. Then, when you start Opera, goto the URL opera://bookmark and move any imported bookmarks that are not where you want them to where you want them.
Since this method replaces Opera's bookmarks file, you'll lose any existing bookmarks and speed dials.