Latent Class and HB should be part of your academic bundle and might not have been added to your License Manager. You can try to add any licenses that you have by going to Help -> About to get in to the License Manager, then click the Add button and point the software at the license files.
If you don't have the license files, please contact the person at your University who placed the order, or send an e-mail to support@sawtoothsoftware.com if you aren't sure who the contact person is and we can look the order up in our records.