To delete application data follow the steps below.Ģ.Open the ProgramData folder. In some situations this data is saved because it's personal information, and not associated with the program. Note: When uninstalling some programs, we also recommend the application data associated with the program be deleted as well. In these situations it's almost always easier to uninstall the program and then re-install it. In some situations a program, or the data associated with the program can become corrupt.