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To fix Quark when it is stuck in a setup loop:
If creating a new Quark folder did not work, then you will need to reinstall Quark.
Look in Applications / Quark if there is a Preferences folder trash it. Then if you have already deleted the Quark Preferences folder in User and main Library go to Application Support in both Libraries and trash Quark folder there too, then reinstall the 188.8.131.52 update: