May be useful, who knows

This is a patch down-loader that downloads the patches(from aerias patch archives) seperately and saves it to a folder. can be used to update game as well.

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created by pwnedbydark.

so could i update my client to exactly 4.5 using this without it crashing the game.exe while ingame?

it does allow you to play while patches are being downloaded, you can then do an update locally at your own convenience.

know what the update number is for 4.5 by any chance ?

Maybe this is worth a try!