Hi docbrazina,
Welcome to the QuickBooks Community, and thank you for getting help with recovering your data. I'm here to assist you.
You can create a backup file (a .qbb file), which can be restored to a higher version of QuickBooks. If you don't have access to QuickBooks 2015 anymore, locate the working company file with a .qbw extension and use it to restore your data in a higher version.
Here are some articles for your reference:
Feel free to go back to this thread if you have any other concerns. We're just right here to help.