How did you verify that the 7.55 started correctly? Single Play? Just trying to make sure we're on the same page...
I've had Windows (98SE) mess up files without explanation, and have had to re-install applications and drivers before...
So: You started with a clean install of D2LOD version 1.10?
Then installed the CE 7.55 Mod?
Then activated it?
Then played it (probably single-player, I don't know of a game server running 7.55)?
Then over-wrote files from the 7.63 .zip file (without de-activating mod)
Then 7.63 failed to run? (game.exe corrupted)
But if you deactivate the mod D2LOD runs fine (single player since battle.net is now 1.11)?
==>What do you do for the LOD CD in the drive while you play