"Build expired" dialog box opens IE, not default browser

When the SmartFTP build expires, it prompts to download the latest build on startup. Fine. But the "Download SmartFTP" link opens the SmartFTP website in Internet Explorer, regardless of what the default browser is (I'm running XP Pro SP2). It should open the link in whichever browser is set as default.

Not as buggy as some bugs, I know, but still.