This is a patch install for MicroSurvey CAD 2008 SP1.3.

You must currently have MSCAD 2008 SP1.2 (8.1.2) installed before installing this update.

Please read the release notes here:
Click Here

Always download installation files to your computer's hard drive and run the install from there, never run the install over the web.

After installation is complete, you should see "MicroSurvey CAD 2008 SP1.3" in the program title bar and in the about screen.

Link: https://s3.microsurvey.com/os/mscad08/8.1.3/MSCAD2008_Patch_8.1.3.exe