Uninstall 1Password

I too have purchased the iMac standalone product (via the App Store) without knowing about the Account/subscription option. Having just read some of the posts above, and wat appears to be the recommended option I'm now going to make the move to the account version. Here in the UK, cancelling an App Store purchase is straightforward, if done within 2 weeks of the purchase. I've done that and my refund is on its way.
My question now is how do I clear out all traces of my standalone installation and what little configuration/data I've managed to set up for it, so I have a clean start when I purchase from the website?