Elements 2018 uses my webcam - turn it off

I have the regular (not Premier) version of Elements 2018 installed on my Windows 10 desktop computer. When Organizer opens it turns on the webcam. I need to turn off that webcam usage - will be doing an Elements demo this week on Zoom and it will interfere with the presentation. 

I tried going through the Adobe automated help system but it says I have not registered my Elements 2018, but it shows that serial number registered at Elements 16; the install DVD also shows that is version 16.0, so the automated attendant is of no help. 

Any idea?