CsvView is an app that I've been developing to visualize a .csv produced by DatCon or TXTlogToCSVtool (@ferraript's .txt to .csv converter). It's still being developed but there is enough functionality to get some user feedback. If you're interested in trying CsvView it can be obtained by going here and then selecting beta version 0.9.3. CsvView is an offline app. There is a rough draft of the user manual that can be obtained by starting CsvView and selecting Help->User Manual. Here's a plot created by CsvView from a .csv file produced by TXTlogToCSVtool. Plots created from .csv file produced by DatCon look much the same.