Music 1 Version 7 must already be installed on the computer in order to use this upgrade.
Fill in the form and you'll then select the file you need. Save the file to your desktop or to your downloads folder. When the download is complete, be sure M1 is not running, then run and unzip that file. It will extract into your c:\music 1 directory and overwrite the earlier version.
If you are running M1 on multiple computers, move the M1upgrade70.exe file to each one and run it there. It is important that each work computer has the very same version of the M1 engine.