Hi Roganslaf,
Thank you for the post. I'm sorry to hear that you've have lost your access to your previous file, and I'm happy to assist you with this. Since you've cancelled this file, you only have 60 days to access this on a read only mode. All the data will be removed after 60 days. To provide you more information, you can check this link, Cancelling your MYOB subscription.
If my response has answered your enquiry, please click "Accept as Solution" to assist other users in finding this information.
If you encounter some issues in the future, please feel free to post again.
Kind regards,
Sai