i think the trick is that you have to configure the regex expression for this file to be like
(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*),(.*)
in other words, one capture group for each column, separated by commas -- i think that is the regular expression pattern for a csv.
it might be nice if the plugin would let you tell it that the data is CSV then it wouldnt need a regex pattern from you and could handle quoted items -- which would otherwise be impossible or hard just using regex.