Sorry, I didn’t get emailed about these replies.
You need to compile the c++ in the project using visual studio.
Check out the vs setup guide in the UE4 Docs.
Exact similar names as Titles are completely allowed in copyrighted works. That said, if you made a Terra Nova movie with the exact same script that would be a Copyright offense. Not the title. In the case of a “Trademark” of the name Terra nova, it’s a different industry and as well would not apply to a UE4 code tool/plugin. 
I bought the Terra Nova example from Gumroad, and unfortunately the updated version with load/save/export options is unable to work after 4.18+. I was able to use the newer RuntimeMeshComponent plugin with the old version of this (without save feature). I was wondering if anyone has gotten it to work in later versions of UE4 (4.21+) with terrain export options.
I was trying to update some of the save code, but the RMC plugin no longer builds vertices/indices the same way and the older version of RMC will not compile without heavy modification because of the engine changes…