If you are using the July software then this faster blinking (4 Hz) is now part of the preset and is expected.
When you click on the Spooky Central Advanced - JW preset some notes appear on the right hand side that explains what the preset it doing.
To make sure you always run safe-settings for the plasma, right click on the generator icon that is connected to the plasma and say YES. This will ensure that the generator gets the right set of settings no matter which preset that you choose.
From what you have said, I doubt that you have damaged the unit.
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