Follow these steps:
1) If you have not already done so, download and install 1st Class
2) Run 1st Class GradeBook.
3) Click on the "Help" menu and choose the "Register GradeBook"
4) A "Why Register" screen will appear and on the bottom right hand corner
of the screen will list your Registration code and serial number, which
should look something like this
Registration code : s5ds-84l4w
Serial number: 42275
5) Please verify both upper and lower case of the registration code to
ensure you enter the correct code.