@BattyCynris When you update OpenComputers (the mod), It doesn't change what is on the computers, it only changes the contents of the OpenOS floppy disk.
So updating the in-game computer after the mod update only requires you to insert the OpenOS floppy disk and running "install" again.
The tool you linked is basically just for those who can't update their mod (playing on a server with outdated version but need features of a newer version) so don't use it if normal updating is available.
