safari extension doesn't respond for 1password 8

I hope this is the right thread. I have 1Password 8 on my Mac along with the 1Password for Safari extension downloaded from the App Store. It works fine when I first install the extension but on restart, the extension icon is not in the Safari toolbar and the extension does not appear in the extension portion of Safari's preferences. It basically means that I cannot use the extension with 1Password 8. I have downgraded to 1Password 7 and it works fine. Please help!