Tonight the Beta 16 brings most translations of the new features, and improves the repair system added in the Beta 2: now, Sweet Home 3D will be also able to restore 3D models and images found in Sweet Home 3D catalogs of the user when it tries to repair a damaged file. This system works thanks to a small new entry named ContentDigests added after the entry named Home. The text of ContentDigests describes the digests of 3D models and images in the file that helps to find the matching content in the catalogs. As this entry didn't exist until now, this improvement in the repair system will benefit only to files saved with version 4.4. You can try it on the following two files (saved them as a .sh3d file):
Damaged home without ContentDigests entry
Damaged home with ContentDigests entry
The second file should be fully reparable with the default catalog of Sweet Home 3D.

sree.arun.kr, sorry I don't think I'll add any additional feature to version 4.4. It's time to release it...