A warm welcome to the Community, Larson0357.
I'm here to lend a helping hand in getting past the error -6123,0 and provide you with some information about moving from QuickBooks Enterprise to QuickBooks Premier. Let's get you back up and running.
To convert everything in your file including payroll transactions you will need to hire a conversion specialist like QBConvert to convert the file.
There are third-party utilities on the market that offer to transfer the data from your Enterprise file to a new QuickBooks Premier file but all of them use the QuickBooks which has limitations so they can't transfer everything. If you need to convert all the data have it done by a professional.
You may find these articles helpful:
Fill me in if there's anything else I can help you with restoring your back up company files.
