HELP! Can't install, close or re-install Audacity

I have used Audacity before on other computers with no problems. Have a new Mac Mini. Program is 2.0.5 OS is 10.9.4 I noticed there is a glitch on the instructions of how to activate/install. It opened but says can’t work because of unavailable Nyquist Files. Can’t close, uninstall, re-install etc. Computer is blocked on this window. Have tried re-booting, forcing close (doesn’t work) unplugging etc. Any help?? Thanx

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