Audio Guiding related issues

Does Okayo provide audio production service?
I get the serial key of Audio Master missed? What can I do?
I have an Okayo Audio Master software which can't work with Windows 8 and Windows 10, it used to work with Windows 7 and Windows XP.
Can Okayo Audio Master work with Macintosh?
In some cases, the museum shall provide videos for the exhibition. Does Okayo Audioguides perform video sync?