I sometimes have 2-3 passwords for the same account. How can I delete the old ones?

@Bathrobe

We do not delete user data. It's best for the human behind the keyboard to make that choice. We have no way of knowing if you intended a second login for the same site. The only known method for sorting duplicates/erroneous entires like yours is via trial and error. I use this when needed. That's the only way to be 100% sure what works and what does not and what should be kept.

To delete an entry select it and in the center column right-click and select archive. This will keep the item out of view but it'll be accessible if needed within the archive at the bottom of the left-hand column. I highly recommend the archive vs deleting the entry.