Windows Download Page To download the 9.1 Client for Windows click here. Save the file to your desktop and QUIT (Exit) FirstClass.  Then run the installer from your desktop.  When you are done, you can delete the installer. Note:  If you have problems (or you see a message that says "the file is locked", look at the far bottom right of your monitor, and right-click the small FirstClass icon... Select "Exit" and then install.    If you don't see that icon, you may need to click the small left-pointing arrow to see it. When the Login screen appears, simply enter your user ID and password and click Login. For information about the Windows FirstClass client click here.             Visit the FirstClass web site to download international clients.