To export .doric files as .csv you should use the Doric File Editor module (see images attached). Briefly, by loading all your .doric data files within the Doric File Editor plugging (find under Analysis option in the Menu in Doric Neuroscienc Studio), you can click the ‘Export’ icon to save them as CSV files. However, this function can only export one channel at a time.
Note: if you are using Matlab, Python or Octave, you can directly read .doric files with code provided here. With a small modification to your data analysis pipeline (a few lines of code at most), you can easily replace .csv file with .doric file. The advantage of the .doric file (HBF5-based) is that it saves both the raw data and the recording parameters together (useful for troubleshooting and/or reproducibility). We’ve moved to this file format in version 6 because it can handle metadata (behavior videos, images, signal, TTL, etc.) and stores very large data efficiently.