Hello Peter,

You might have a version of the program that was designed to run directly from the CD. You can still copy this to your hard drive. Just create a new folder on your hard drive, and copy the contents of the Data folder on the CD into your new folder. Run the program by double-clicking on PMCLASS.EXE. You can make a shortcut to this file, and install updates from our website, just as if you had installed the program from a newer download.

What probably happened was you copied the entire CD (rather than just the contents of the data folder), and you're double-clicking on the .EXE launcher which was at the root directory of the CD. That won't work.

Andrew
PG Music Inc.