From OHRRPGCE-Wiki

This menu allows you to do two important functions for your plotscripts: Export the HSI file, and Import the compiled plotscript.

[edit] Previous Menu

This takes you back to the previous menu, the Main Menu.

[edit] export names for plotscript (HSI)

This creates a file named <gamename>.hsi in the folder with the RPG which contains many constant definitions. It's designed for use in your plotscripts like this:

include, plotscr.hsd
include, <gamename>.hsi

Except, replace <gamename> with the name of the RPG file.

[edit] import compiled plotscript (HS)

This allows you to browse and select a compiled plotscript file (*.HS) to import. Then, any scripts that you define can be used in the rest of the game.