The upgrade has been staged and will begin tonight for all companies. After the upgrade is complete on your computer, the software will need to be registered again. The registration process is completed by clicking the Register button in the below picture and logging in with your DTNAConnect credentials. The Registration Key and Computer Description should be prepopulated with the info from the 8.4 install which should be correct.
If your PC has not received the upgrade, a restart should start the installer.
Should you need assistance with this process, please submit a ticket through our Support Center.