Hi,
There is a very nice and simple programm to automate this task. Oscilloscope companion. See this web page:
http://ogrodowa.gosiewski.pl/publish/OscilloscopeCompanion/The program is able to download
* visible part (usually 1000+points) (normal)
* all live downloadable data (Maximum)
* in STOP mode it can download full memory dump (RAW)
and there is automation built into this programm, it can automatically create CSV file upon every waveform fetch and it can automatically copy this file to clipboard or save to disk in different variants.
The same for screenshots and measurements.
The programm is free to use with Rigol scopes.