Mozilla Connect

I've recently moved to the 114.0b5 beta and I cannot find the "edit as new message" option any more. I found this a very useful option. Has it been removed, or is it just hidden somewhere  I can't find it?

I just installed the Supernova beta version (having been prompted to do so, without it being very clear that this was beta software, which I question somewhat). It wasn't clear to me before I did so that this would be a complete new install that woul...