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At first, when I go to Options > Multiplayer, everything would just be frozen, had to close with task manager
after doing the steps you shown below, it wouldnt be frozen but I cant see any of the sprays(unless it only 1 spray)
1 - move your addons folder to desktop
2 - uninstall the game
3 - delete the l4d2 left over folder
4 - reinstall the game
5 - move the addons folder where it originally was
Now the game should run fine, Doing this can fix a host of problemss from sound bug crashing the game, Mods not working right anymore etc, All the patches from the devs have know to cause alot of mods not working for everyone, In different ways, And some not even working at all, Hopefully this will work for you.