It's actually an empty "powered by" SWF, so it's not
clickable, and so you never get the about box coming up.
1. Go to
this
page and download the .zip of the file for RH X5 (it also works
for 6 and 7).
2. Unzip the folder and move the file to the place in your
source files where your skin's SWFs are located. Rick's "powered
by" SWF will overwrite the one that's there.
3. Run and view your output. No more "powered by" button, so
no more about box.
If you want author/company information, you could put it in a
footer in a topic template and apply it to your topics.