Hi guys, I work for NetSafe in New Zealand, the developers of Hector. Your link to the contact us page on Hector's World Information Island triggered a blog comment and I'm sorry to hear the feedback at hectorsworld.co.nz email address bounces.
The safety button was developed a fair few years back now but I'll mention your issues to the guys who wrote the code for the button and see if there's anything we can do.
As a cybersafety organisation we'd certainly say stick with the Flash updates over Hector - best to keep your ancilliary programmes updated to ensure your machines are not vulnerable to malware.
We had an issue like you describe on Macs before when the OS was updated so I'm guessing the black box is a similar transparency issue. If anyone can post a screenshot of the problem that would be great.
You can contact me via PM on here or to our queries at netsafe.org.nz email with more details on machine/browser/flash specs. Thanks, Chris Hails