This file is invalid for use as the following security catalog

[Yangjo]

When I open this file with the .cat extension, it says, "this file is invalid for use as the following security catalog."
I also do have the .cas file with it as well.
How can I fix this?

 

[rgd1101]

What application created those files? Install that application.

 

[Yangjo]

What application created those files? Install that application.

I am not so sure, it was something to edit game files. A mod, basically.