Delete the folders at these two paths. Sometimes these files get hosed up and cause issues
-
C:\Users{insertYourUsersUsernameHere}\AppData\Local\Epicor\Epicor.exe_StrongName_blahblahblah
Delete the StrongName Folder -
C:\ProgramData\Epicor\epicorap-808
Delete the folder relevant to the environment they are having issues with