My translation
Put in the install folder and run - no need to delete the old exe:
http://ulozto.net/xRuGZoXT/san11editor-eng-exe
San11 Editor 1.06 Build1211
Download "San11 Editor 1.06 Build1211.rar" from http://pigspy.ys168.com/
What it does?
San11 Editor is a program that allows you to easily do everything we normally do with an hex editor (and the editing guide) and a bit more. You can edit the contents of Scenario.s11, Scen0XX, Msgs, among other things like simple cheats done by editing RAM while game is running (showing all shrines for example). It's an interesting program, the problem is its language (chinese).
It's worth noting that it supports chinese version of the game fully, japanese version (except by few features I think), but not english version (although it does work in many cases — LCC used it with Scen0XX).