There’s a new version of the installer out – v2.0.1. This one’s mainly to fix a problem on Linux where you would only be able to download about 500 files before the installer would stop, forcing you to quit and reload to continue the download.
However, although you won’t see much difference on Mac or Windows, the internals of the file downloading process have been improved slightly for all three platforms, so please grab the new version from the opensceneryx home page.