Click on Start button and select Programs -> 1DCutX -> Examples and select Several Stocks and Parts.xls as shown on the following picture:
It should open the Microsoft Excel and you can run 1DCutX now.
3a. Microsoft Excel 2003:
1. Select "Tools..." in the main menu.
2. Click on the "Length (1D) Cutting Optimization..." menu item as shown on the picture.
3b. Microsoft Excel 2007-2013 (32 bit):
1. Select "Add-Ins" in the main menu.
2. Click on the "Length (1D) Cutting Optimization..." ribbon element as shown on the picture.
3c. Microsoft Excel 2010-2013 (64 bit):