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If your CommandFusion iViewer license is not working (or has stopped working for any reason) please follow these instructions:
If the Device ID being shown in the guiDesigner Upload Service differs from the one you used to register your device, please submit a support ticket with the following information:
Then we can transfer the license for you.
Since iOS 6.0.1, Apple has removed the ability for apps to access the hardware Device ID that our licensing system was using. So we have built in a new Device ID format just for our iViewer software licensing. Devices that were previously licensed and running iViewer4 should remain licensed without any changes. But in some cases the new Device ID must be used.
We apologise for any inconvenience this may cause, but it is a necessary change due to Apple's privacy concerns related to accessing the hardware device ID.