With the new release of VoxGuru 1.1.2 update on June 20th, the addition of Offline Activation was introduced, which meant having to adjsut the way the license activation process works.
For everyone who installed it prior to that, the individual modules will no longer activate and will need to be updated to their latest version to properly run.
Simply head over to the Downloads section in your Account and re-download the plugin. This will automatically download the updated 1.1.2 installer.
Then install the plugins again.
Now you only need to activate any of the 6 plugins (the full VoxGuru or any of the individual modules, and the other plugins will activate automatically, no need to enter the license into every one).