BUT - recently got the chance to convert ot MODERN Garmin Connect
I can upload runs from device to Modern - no problems
But I can't download workouts I've created to my 310 if using Modern - but I can down load them if I switch back to old / classic version
In Modern when I try to down load workout I get: Previously your device talked to Garmin Connect or your computer using the Garmin Communicator Plugin
or the Garmin ANT Agent . Both have been replaced by the new Garmin Express program."
It then presents a link to click through to the Garmin Express down load page - but it's already installed! Express recognises my device and I'm linked into my Connect account on Express.
As down loading workouts is fine in old / classic but not not working in Modern, then I assume this is a coding issue rather than something I'm doing wrong?
I'm going back to old / classic for now - but hope this is resolved before we are all forced onto Modern!