Wish I received these replies a bit earlier lol. I kept googling and didn't think about reinstalling an older version of Opera first, so I resorted to manually copy and pasting each address from the file into another browser and creating new bookmarks. Took me 4 hours but now they're sorted... Thanks anyway, if I ever come back to Opera this info might come in handy.

I exported my opera bookmarks and saved them on my external hdd before I reinstalled windows, but now I have an adr file I cannot import back into opera. What is wrong/what am I doing wrong? More Tools - Bookmark importer is greyed out, I cannot use the option. Is there any other way to import?