I tried using the passwords as they come up on the computer but I do not understand how these work.

I was using 1Password until it no longer works with the updates. Rather than pay them money, I tried using the passwords as they come up on the computer but I do not understand how these work. How do you change or edit them? where are they stored? One of my Bank sites the User name will not store. The Password was changed and now only the old one comes up. How do I make the new one store? Is there information some where that explains this? Thanks for any help anyone can be.

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