I have the files but my program is saying there is no vector info in the files . The conversion program shows a nice picture of your design
Which you can rotate but and look at but that’s it. The file size is very small .ummmm….. From what I have read so far is the cad file needs to be exported as a .DXF with all vectors info which can be done from AUTOCAD , perhaps you could ask your friend this type of export. The software did not like the other types either . { only the .stp but I don’t think there is enough data in it. } fine if you want a 3d model to look at .