Avast Secure Line-When turned on all browsing freezes and won't work on MAC

Hi. We have used our Avast Secure Line for quite a long time with no issues. All of a sudden when we now turn it on our browsers freeze up and stop working. We just get the infamous spinning icon! We have a Apple Mac computer and have been unable to discover what is causing this problem now after it has been working just fine for so long. Any suggestions would be greatly appreciated as I’m not super tech savvy and have been unable to figure it out on my own.

Thank you.

Please ask here: http://forum.avast.com/index.php?board=5.0

Thank you.

You’re welcome.