Goto the URL opera://bookmarks and check the bookmarks trash. If the speed dials are in there, you can undelete them.

Or, goto the URL opera://bookmarks and use the drop-down at the the bottom left to export your bookmarks to bookmarks.html. Then, goto the URL opera://about, take note of the "profile" path, close Opera, and delete the "Bookmarks", "Bookmarks.bak" (if present) and "BookmarksExtras" files. Then, start Opera and you'll see that you have your speed dials restored. Then, goto the URL opera://settings/importData, select "Bookmarks HTML file" in the drop-down and choose to import bookmarks.html to Opera's bookmarks mar. Then, you can goto the URL ````opera://bookmarks``` and move the imported bookmarks from the bookmarks bar folder to if you want. You can also delete the imported speed dials as as you're starting fresh without them.