I have begun shooting in RAW on my Nikon D3100. However as I am using Lightroom 3.3 which I am unable to update, I am having issues exporting my files as RAW.

Unless I choose to export the file from Lightroom as a JPEG, the file is un-openable on my computer. The file does seem to be twice the size when I shoot in RAW and export as a JPEG. However I am worried I am losing quality etc.

Is there a way around this as I can not update the software on my Lightroom version. Am I actually loosing the quality by exporting the RAW file as a JPEG?