@jaklloyd, thanks for pointing this out. I was able to duplicate this behavior and have filed an issue. A work around since you can download the component using a web browser would be to go to follow these steps.
- Download component from web browser
- Unzip contents
- Go to file menu in the OpenStudio application and choose "Load Library"
- Browse to and select the OSM file from the unzipped component.
- You should now see the material in the library, but it won't have a blue "BCL" tag on it like it would if downloaded directly through the Application.