GOOD NEWS!
I figured out the problem. I thought it was odd that the ID of each entry in the .properties file contained the name of the BlendSwap file within the ID, but this wasn't the case for the other sh3f .properties files. So on a hunch, I took that out of the ID text and left the id name, checked it in SH3D, and sure enough that was the problem.
So here's how you fix it:
1. Open BlendSwap-CC-0.sh3f with 7-zip, or some other decompression program.
2. Extract the file PluginFurnitureCatalog.properties onto your desktop.
3. Open the file with a text editing program like Notepad, and do a Find/Replace.
4. In the Find field, enter Blend Swap CC-0# and mind the spaces and trailing pound sign. Replace all instances. You should notice this text disappear from the id= lines of each furniture entry.
5. Save the file and put it back into the SH3F archive. Close the archive.
6. You can then make changes with FLE, then open it directly with SH3D. The new categorization should be correct.
I don't know why the SH3F reader in Sweet Home would treat an edited file that way, but at least it's there if we need it.
If all goes well, consider this thread [RESOLVED]!
