Web page link in Program help inaccessible

I use Textpad as my editor. Also there is a shortcut [designed by Textpad] so that calls to notepad are diverted to Textpad. I’ve had no trouble to date, but now if I try to access the site link in Textpad’s “About” screen, I get blocked, with a message that I may not have rights.

Both the shortcut and Textpad are listed in the Safe files list, so what would cause this, and how do I fix it?

Chuck Billow