Buttons disappear and a weird line appears

The BTT buttons randomly started disappearing and I have to restart the app in order for them to appear again. This can happen every few minutes over and over again.

Try ugrading to the latest version, there have been some possibly related fixes.

I have automatic updates on. Is there a way to force update?

Yup, just click the menubar icon and choose "check for updates"

The menu bar is not appearing at all for me. I've update to the lastest OSX yesterday so maybe that's the reason?

Maybe you disabled it?

Yup, it was disabled. I'll let you know if the issue persists. Thanks.