Apple released iOS 16 today (Sept 12). As of this writing initial testing reveals no issues with APDL or Logbook Pro.

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Message: [QUOTE="Neal Culiner, post: 12582, member: 1"] Hello, Unlock Code, Serial Number, Key Code are all synonymous. If you're having a problem registering/activating a product please submit a support ticket and include the information you are using, your order number, etc. Please also refer to the [URL="http://www.nc-software.com/policies.aspx"]policies[/URL] and the Lost Unlock Codes section, this will give you information to retrieve your prior order information. [/QUOTE]