Quote Originally Posted by Bob View Post
I'm thinking.
Download beckdac and unzip.
Load files into arduino.
Copy old configh file.
Delete new configh file from beckdac.
Paste my old configh into beckdac.
Will that work?
I would suggest getting Arduino to compile the BeckDac release clean with no errors as a starting point. Make sure you can do that with your board set in Tools/Boards. Then, I would use a difference program to compare the two Configuration.h files, and cross over the important settings.

I would not just copy the old file and replace the new file because you are going to break other stuff that has to be there. Unfortunately, you need to go through line by line and cross over the changes. But a good visual diff program will make that just a 5 or 10 minute nuisance.