Tried that also, didn't work.
The file that you sent is a .xlsx Excel file that was created by running the export to Excel function. It is not intended to be opened and used by the calculator and not intended to be used as a backup that the calculator can restore from.
You should have a .xml file which is what the calculator uses. By default, this file will be in your "My Documents" in a subdirectory called JuiceCalculator. The .xml is what is needed by the calculator.
I used the Ingredients sheet from the spreadsheet you sent and created an xml file which I sent you. This recovers your ingredients and inventory but it does not recover your recipes. Unfortunately you will have to manually renter your recipes by looking at all of the other tabs in your spreadsheet.
I hope that you can find the .xml. Please make sure that you go to the "Tools->Options", backup tab, and set the calculator up to automatically create backups.
Sent from my iPhone using Tapatalk