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What gets changed in our maple folders other than the wz files when maple patches? I copy & replace'd the glitched 0.80 wz files with the 0.79 wz files from another computer through a flash drive, but I when I try to enter the game, I get the new 0.80 screen and a -2.147bil error when I press start game.

The MapleStory.exe file itself gets patched too. I ran Fiel's patch reader and it created a temp folder to store new patch files, it included a total sum of 25 files. I'm guessing .wz, some of the .dll's and the ms.exe.