@Anonymous , thank you for your ideas. It turns out that the files I was looking for were not in any of the Program Files directories. They were in:
"C:\Users\Earl\AppData\Local\Apps\2.0\Z29TCPE5.944\RK99RK5P.J9K\voca..tion_0000000000000000_0001.0000_dbb298f2ffe4bd6d\"
I found them by searching for a text file name that is read by the program. I set up the program to read text files so I would not need to recompile the program each time the data in the text files changed. This is useful for end users, who can edit the text files with minimal hassle. They do not need to compile any code.
I searched for the text file via the Windows file explorer in directory "C:\Users\Earl\AppData". The file was in the "Local" subdirectory (where I was not looking) instead of in the "Roaming" subdirectory (where I was looking). All of the input data files and some of the visual studio files associated with the project were in the above directory.
I would prefer that all of the files in the above directory be in one of the Program Files directories. I have been unsuccessful at determining how to make that happen when the program is installed using the setup.exe file generated by VS 2019. If anyone knows how to do that, please let me know. Thank you.