Allow me to chime in and provide additional information, @MadMedic953.

To begin, I suggest using our QuickBooks Desktop Mac trial to upgrade your company file to the most recent version. Once you have done that, make sure to create a backup copy of your company file so you can always have a copy of your financial information. This will help you recover your file without any difficulty whenever required.

For the specific third-party app, you can ask @Fiat Lux - ASIA  for more information about the third-party app or for recommendations.
 

I will also add this article to guide you in update your company file: Update your company files to a newer version of QuickBooks Desktop.
 

Please let me know if you have other questions about the backup copy of your company file or other QBDT-related concerns. I’ll be right here with you.