New Connect ME 9210 -C DC-ME-Y402-C PN Net+OS custom project

Hi All,

I am very new to this, I face an issue as some new Ethernet modules are not able to flash the existing image.bin file.

[New Connect ME 9210 -C DC-ME-Y402-C PN:(1P)50001528-36 modules won’t run our NET+OS image.bin app | Digi International]

So am looking for building a new application with latest software patch.
But I am not aware of where to get the latest Net+OS 7.5.2 and how to build the sample application.

If someone providing a link or guide me in few steps how to get the Net+OS 7.5.2 and compile it.
Thanks In Advance.