I upgraded and lost old data. How do I recover it?
I was not using my old account, so I was not paying for it since last year but, still, I was able to read the old data in MindMeister. I've just decided to come back so I upgraded for a personal account and made the payment. I've lost many of my old mindmaps in the process. That was a lot of work. What can I do to recover them?