Kindle Fire Dolphin Browser backup issue

Can anyone help me? I have Dolphin Browser for my Kindle Fire HD Second Generation. I'm trying to restore a backup file, which contains my browser's bookmarks/favourites. I've tried going through Dolphin's inbuilt feature. (Settings > personal data > backup and restore) When I do this, nothing happens. It's incredibly frustrating. I can't open the file in notepad, notepad++ or internet explorer. When I do, these things either freeze or open up a file of unreadable text. The file type comes up as .file. Any help greatly appreciated.