I hate to beat a dead horse but I've found no answers that helped me so far. I am trying to put .pdf files on my TI-Nspire CX. I've installed ndless along with nPDF, however when I try to move a .pdf file into my calculator it doesn't work. I tried re-naming the file to .tns but it seems to automatically change it to filename.tns.pdf. So that isn't working for me either. Can someone please help me?