If you are asked to "Choose a digital certificate" when attempting to open an export file in Microsoft Excel, or are otherwise having trouble with downloads, please try saving the file to your computer's hard disk by following the instructions below. Internet Explorer users should right-click on the download link and choose "Save Target As..." from the list of options. Firefox users should right-click on the download link and choose "Save Link As..." from the list of options. Mac OS users can open the list of options by alternatively holding the "Open Apple" key while clicking on the download link.