Unable to close DAZ central

sliders49

I propose an interesting question. I am trying to complete an upgrade on my Mac as my Safari browser cannot be opened.  I use Safari a lot and it upgrdes on Mac upgrades. My issue is I cannot do it until I close all programs. I have tried and tried but cannot get Daz Central to close and thus it keeps blocking the restart for the upgrades. Any suggestions?

I would really lke to finish the upgrade but so far....I have to get Daz Central closed down.