Unfortunately you ran into one of many games which takes an extra skill set to work on. I was interested in uncensoring a few flash games not too long ago, and after realizing that it involves individually editing thousands of images for their respective frame, I said hell no.
I prefer my mental sanity intact. When you find a game where the mosaic / censor is not a shader, or post process, it is instantly 100x more difficult to remove it because it's baked into every frame.
I haven't tried opening other Unity games and their assets within SBU3, I know I was forced into using it to make some modifications for some Illusion mod at some point, but after that I've never needed it. As I said to the other user who brought it up, it's a massive modder's resource... which includes the learning curve involved with using it.
You can also take a look at post #10, which has the spoiler attached showing the officially supported game meant for SBU3. This was pulled directly from the HF thread. So if you use that program to modify any other game, it shouldn't be a big surprise if you wind up with some problems.