My application will not start and shows error 42.

There are insufficient user permissions to access the locations where the license and alias files are created. Make sure that the program is first executed with administrator privileges are created. Once the license and alias files are created, the application may be run without administrator privileges. 

More information can be found in Using Protection PLUS on Windows Vista and later.

You can also refer to the Instant Protection PLUS 3 Wrapper Deployment or DLL Deployment topics.