Thanks again Robert (I've had to use the 'reply with quote' option as the normal reply button has disappeared so hope this reaches you ok).I've done everything you said and now have a fully working version of Prusaslicer 2.3 and the installed davinci jnr s/w you sent on the earlier link.Question is (hopefully final one) can I load any pre-existing models for my printer - I don't want to design one from scratch (yet). The demo that came with it has a file extension of .3w buton the site I've used (XYZPrinting.com) some of the models (e.g. Eiffel Tower) have that .3w extension but still won't work on my printer (file error).Also, on the Prusaslicer software, when I try to open a file from my SD card, none of the .3w files I have saved to it appear?Can you pint me in the right direction (again!).Many thanks.Mark