We were going to wait for 1.0 to release, but I believe the current Steam version has become too unwieldy/messy given that we can't access the first 5 parts. We are considering uploading a new version that will be 4 parts. It would require all Steam users to migrate to the new version, but I believe it will be best in the long run.
Also, 3 of the 4 parts will be used in 1.0 because it contains our textures/models/etc. I wanted to warn everyone about the possibility of this change ahead of time.