After SafeBrowser Upgrade Avast Internet Security doesn't load

Avast Free Antivirus / Premium Security
1

After upgrading SafeBrowser my Avast Internet Security application flashes the main menu screen when I attempt to load it and then closes down. Please help - thanks.

2

Have you tried this? >> https://www.avast.com/faq.php?article=AVKB204#artTitle

3

→ https://forum.avast.com/index.php?board=78.0