Clicking Atlas Converter from the Utilties menu button will open a new window. This new window allows you to pull out the individual files (frames) within a tiles atlas texture file as well as generate new atlases from individual files.

Converting from an atlas to individual frames will ask you to select either an input PNG or DDS file and an output folder. A new folder with the same name as the input file will be generated within your selected directory on conversion. The file will be split based on the rows and columns selected (in the form ####.png). A preview of the output dimensions will display during this process.

When converting from frames to an atlas file, ensure that your files are named in the format ####.png to maintain sort order.