Have you emptied the Save folder? "C:\Users \UserName \Documents \SH4", with "UserName" being what you log into Windows with, and Documents might be "My Documents" depending upon your Windows version. Or, the easy way, if you have the Quick Access sidebar open in File Explorer (This PC, etc.), just click on Documents and then find the SH4 folder in there, and delete its contents. This will destroy your career progress thus far, and re-set all of your visuals and other preferences.
