I'm running R13.016 and haven't used it for a while. Now when I try to 'save as' it defaults to saving a 'layer set.set' It's 32kb. If I try to change the 'save as type' options from 'All files' to '3D-formats' and manually enter a .c4d extension it still only saves a 32kb file.
The save and incremental save work normally. I guess I've done something to change this setting but have no idea what:-( Any ideas?