Two Zoho Meeting Buttons in Firefox

Two Zoho Meeting Buttons in Firefox

I have Zoho Meeting FF extension 1.0.0.1 and when Firefox opens there are two buttons in my toolbar for it.

I go to Firefox toolbar customize and pull one out and that session remains fine. But when I close and reopen Firefox, two buttons are there again.

Is this a bug or have I done something wrong?

Both buttons work fine, but I only need one. :)