based on my experience so far, I'll state what I currently know about the new patch on NAGC that stopped kom edit method.
1. newly replaced files at the time of patch are: main.exe, dat files, Ver.xml in the parent folder, and some minor files in each folder.
2. GameGuard as far as I know does not show in-game messages. It just has access to main.exe to close, hide and stuffs, and when it shows error messages, it's not accessed by main.exe itself, and it shows up on the new window while some crappy des file is running. Current error message is an in-game one, so I'm betting GameGuard is not an issue here.
3. Extracting, and then repacking without any edits still gives error, even after making kom file's CRC and file size the same. crc.xml creation does not have any indents and a space between slash and CRC data, which I think is the reason why it doesn't have the same size and CRC as the original one. The stg and lua files keep the same file size, just crc.xml doesn't.
4. It DOES check for ai.kom, fan_map.kom, and script.kom, but it does NOT check files such as sound_korea.kom, minigame.kom, and stuffs. Idk how this can be used in a... useful way.
5. I was trying to open main.exe, and while PEiD said it's packed with ASProtect 1.XX or w/e (someone posted ss of it too), I personally think it's ASProtect 2.0 after doing some crappy things with ollydbg. But even if I decrypt it, idk how I can encrypt it exactly again.
6. (I forgot, I'll write this down later lol)
That's all the information from me so far. I'm currently a bit busy with newly started school and part-times, so I can't reply fast.