I am having similar problem. When I install dvd architect, music maker and other two programs download but not studio. I uninstalled reinstalled a couple times. Uninstalled my avg nothing has worked.
I sent technical support a note they sent me back an email with 3 FAQ and asked if that helped. I said no and no other communication. Tried to call support that was a failure could never get opportunity to talk to anyone. So like yourself I have to post on a forum in hopes someone will see and respond.
i have heard good things about this product but will likely return and never purchase another thing from magix