Has anyone been able to update this drone to the latest version of ArduPlane?
Hi,
You probably mean OMPHobby ZMO v2 VTOL plane.
This is my understanding.
I might be wrong, but I don’t think it’s even possible to upgrade and flash a later version of Arduplane directly from Ardupilot.
Omphobby has their own flight controller and compiles their own versions of ArduPlane to run on it (based on ArduPlane). For example to use their own airspeed sensor, compass, gps unit and also motor ESCs these are unknown to Ardupilot and require some settings they have in their proprietary firmware.
This is annoying and I don’t see what benefit the company gets from this arrangement.
What are you trying to do and why?
I have asked them before for later versions and sometimes they give me.
You dont know how many times I have been close to throw that FC out. All times I have stopped because of all the pain to tear out their very nicely integrated power distribution board and nicely located airspeed sensor etc etc. It works well for now.
You could try exercising your GPLv3 rights 
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If they don’t comply they can become another Radiolink 
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Hmm… I have never before given the GNU and General Public License a thought.
So Ardupilot use LGL version 3, LGLv3.
ChatGPT gave me this quick summary or version 2 and 3
Quick analogy
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GPLv2: protects user freedom to access and redistribute source code.
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GPLv3: protects that freedom even when patents, DRM, or locked hardware try to restrict it.
Thats interesting. However, the source code will not do me much good since I can’t develop/change it.
But maybe someone else can @Kumar_Aiyer
License is binding between the manufacturer and you but AFAIK you are free to share the obtained code 
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