Unfortunately the new Color Picker introduced with Release 17 doesn’t offer any third-party API to manipulate the swatches. Once this is available we’ve got lots of ideas for how we can update SwIm to take advantage of the new functionality.
SwIm 2.0 (now 2.1) has been updated for R17 and should be downloadable via CV-Toolbox. Please let me know if that isn’t working for you. Also, as Rick said, unfortunately there is no swatch support in the current plugin API which means there’s no easy way to import swatches to the new color chooser.