Hello Randbjams, Zulu should not delete any of your music, it should only load it from its current location. NCH Software programs sometimes require to download a compliment to perform certain actions, the component you download from that link is the "Sound Exchange Decoder Component"
The Equalizer should be located at the bottom left of each deck, if yours looks different take a screenshot and attach it to a support ticket you can enter at http://www.nch.com.au/support/index.html