You should use either the old spine-libgdx or the new one. You can't just update one of the files. Having nothing rendering can be any one of a million things, so it's hard to say. As with any problem, start by verifying each of the assumptions you are making. Make sure the code that you think is executing really is, that it is doing what you expect, etc. Use breakpoints.
The 6 languages are nearly the same so it isn't so hard (except Lua with its silly 1 indexing instead of 0 indexing!). 🙂
An asterisk in Eclipse means the file is edited but not saved.
