Use this importer for MD2014 and MD2012 I think. If it works for any earlier versions of MD I do not know.
For MD2015 the extension had to change and you can get that version here:
https://github.com/stant/mdcsvimporter2015/releases
Use this importer for MD2014 and MD2012 I think. If it works for any earlier versions of MD I do not know.
For MD2015 the extension had to change and you can get that version here:
https://github.com/stant/mdcsvimporter2015/releases