When you received the software package, you should setting the parameters first in the system dialog.

The setting dialog will be opened.

Input the group or company name in the title

If your interferometer is working with He-Ne laser,  set the wavelength to 632.8nm

For Fizeau interferometer, please keep the Stripe value to 0.5

If the clear aperture is 95%, you can type 0.95 to the Aperture % directly.