Thanks, the UI doesn't make it very clear that you can select rows so I missed that.
I use 1Password religiously but until now I'd been lazily saving passwords in Chrome as well to avoid the hassle of entering my master password. I feel slightly ashamed that I just assumed Chrome stored them "securely" and didn't give it any more thought.
Don't forget to turn of the option to save passwords, and optionally install a password manager extension (I use 1Password).