Board Thread:Off-topic Discussion/@comment-27713488-20170606001125/@comment-27886747-20170710193631

Most RPGMaker VX data files are binary, not plaintext. :) Thus, they can be reasonably edited only with RPGMaker itself. You can do some stuff with Notepad++, though - I've used it to find specific parts of the dialogue with the "Find in files" feature, and even to track down the use of a variable, once I figured out which sequence of symbols represented its number (you need to know about ASCII for that, and to figure out RPGMaker's strange offsets).