In all honesty, I’m not 100% sure. I’ve started using Blyink with an open-source project that uses it - I’m logging in with “Custom Server” @ blynk.remoteapp.de because of another application.
Does this mean csv download will not work - do I need to switch to Cloud?
The download will work, if you can manage to work-out the correct url that will take you to the file.
Presumably http://blynk.remoteapp.de is a DDNS service that points to the current public IP address of the network where the server is?