From here it is pretty straight forward. Select the address column, or alternatively latitude and longitude columns, that pick what you wish to do with the data, whether it is to plot markers to the map, or do some drawing functions. Also in this window you can select a range via start index and end index, this allows you to only plot the points within a certain range of rows. For instance, if I only wanted to add rows 50-100 of a spreadsheet.
We are working on implementing thematic mapping support, and when it is implemented we will let you know here.