I had no problem downloading the update. But the updates are not wanting to run on my computer.

So I have downloaded two files from the site. My trouble occurs at the second step when I try to run the installers. They show up in my Downloads file one as” Install%20Poser%2011” the other as “PoserSupport”. When I double click on either of them I get a window that says “Do you want to open this file?” I click “Open” and another window opens with the heading of “Open with” and there is a list of programs on my computer. I have attempted to choose different programs from that list but it will always cycles back to “Do you want to open this file?” and then the “Open with” window. I've contacted support but there solution was to re download the update and try to run it again. I've tried three times and always the same result. Anyone else with this problem or solution? Thanks