If you'd like to use a custom skin on ANA 2 on your system please follow these steps:
1) Close your DAW
2) Download and unzip the file if it's in .zip format
3) Copy and paste the skin's folder into the GUI folder in the following location:
4) Open you DAW and the skin will be in the Settings tab under Skin Select:
If you have additional questions, please submit a support ticket here.