Outlook freezes on launch, how to recover old identity data

Okay, upon launching Outlook for mac today, it freezes every time, spinning beach ball of death, then times out with an error report/restart screen. Okay, I went through a rebuild of the main identity, no luck, same issue. I had created a backup as part of that process, but using it as main identity didn't solve the problem. I created a new identity, which meant setting up all new account info, and that's working, sending and receiving emails, but I don't have access to all the data (messages, contacts, etc) in the former identity. It's an important resource for me. Is there any way to recover this, either through an import of the old files to the new account/identity, or another method?