Your LabChart License codes can be found on the back of the LabChart and LabChart Pro disc cases that were provided at the time of purchase.
If you are using standard LabChart, you will only need one code from the back of the LabChart installer disc case. If you are using LabChart Pro, you will need both the code on the back of the LabChart software installer disc case, as well as the code on the back of the LabChart Pro installer disc case to complete one installation.