Zerynthapp python module not found

I have a project running normally for six months. Suddenly it is no longer accessible via the zerynth app because the zerynth app cannot contact the zerynth server. So I download the latest zerynth studio and try to compile. I now get the error:
Can’t find module [zerynthapp.zerynthapp] imported by …
Sure enough the zerynthapp.py module is no longer supplied in r2.6.1 libraries.
Is this functionality no longer available?
The current documentation (which I might add IMHO is a worse version that the previous) still mentions zerynth app with example.

I now see that the release notes for the latest version documents this being no longer supported. It is interesting that this no amount of searching the internet reveals this information and no mention of it appears in this forum (that I can find)

Ahh well…