You no longer need to do this and is not recommended, as it would need done often.
This has to do with direct storage.
There is a command that you can use instead:
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Open the bnet app
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Click the gear icon next to the play button
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Game settings
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Check the box for command line arguments
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In the box put the following command:
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-disableds
Okay out and done. Before that command was available, the other option was a work around, however it didn’t disable it very well and was not a recommended solution.