The problem with DIVX installer is most users will (like a PC user) click Continue/Next to get the application to install, putting the SKIP button as the left button of the two on that form will mean the INSTALL button is in the place most users would expect to see NEXT or CONTINUE.
This means they will be accidentally unwittingly installing ZipCloud as part of the DIVX install, probably wont notice it until some sort of pop-up or notification appears, and they will then think it is spam ware or could be malicious. In some ways this is a cold 'free' sell/install of a product the user probably doesn't want.
I installed it the first time I installed DIVX, I nearly did it again tonight on the new version, but after the installer was running for DIVX and I had inadvertently agreed to install ZipCloud, I couldn't cancel it! - There is no cancel button to abort, and the 'red' cancel dot does nothing.
My only option was to bring up Force Quit Applications (CMD+ALT+ESC) and kill the installer.
This piece of software (ZipCloud) should be made more obvious to users and better information as to the fact it has nothing to do with DIVX, the SKIP button should be defaulted to SKIP, and the installer should be given the option to Cancel when the install is running (or an uninstaller should be provided)
It puts me off installing DIVX which is a shame as it is a great piece of video software.