Yeah, I tried the reboot thing and it didn't work, so that's why I waited for the next update.
However I, like many others here on the forum, are having problems with Avast spontaneously turning itself off. This started with build 507 and the bug still hasn't been fixed. Clicking on Fix it doesn't work, and neither does Repair or reboots, so you end up having to do a clean install for Avast to work properly.