This dialog box is part of the Language editing modes dialog. These options allow you to specify the names of external utilities (commands or programs) which should be used under various circumstances.
"I have been using the CRiSP editor for about 3 years. It is by far one the best text editors I have ever used. It is very reliable, and I have yet to lose any data using it. It makes the editing and compiling process effortless, and it frees up more time for other tasks. The colorization, buffering, and column editing features are well worth the cost of this software."