impossible to sync NoteBooks since v 8.1

I used every time NoteBooks since a long time, and I like this app ;
but with the last version n° 8.1 from 3rd August (with iPhone 6 iOS 8.4), its impossible to sync the notes with my Mac (I have not NoteBooks for Mac) ; it was ok before this version 8.1.
I usually sync with SyncDocs for Mac (version 0.6.7 always the same since many years)
but now when I want to sync, appears this (in french) message on my screen (iPhone) :

invalid Server
the selected server is not a valid/confirm SyncDocs server

I selected before the server : SyncDocs._http._tcp.local.
>> not sure the address of the server was as complicated as this one before...

thanks a lot for your help

mr.jack.b about Notebooks 8, v8.1