The problem is that the one client data file did not show up in the list to select which files I want to transfer into 2020. It did not come over from 2019 so it isn't even there in the transfer list. I looked at 2019 and it IS showing up in the 2019 Pro Series files but it is not showing up in the list of files that came over from 2019 Pro Series. Rebooting is not the issue. 

I'm wondering if there is a way to find each data file from 2019 and find this one client and then move it into 2020 Pro Series so I can transfer it in. I hope this explanation makes sense.