DjVuLibre Djview can be used to Convert DjVu to Tiff

I was looking for a tool to convert a single DjVu file (with 17000 multiple pages) to a single tiff file. It took me a long time to find the tool: DjVuLibre Djview 4.5 is the best.

It is freeware and available for all operation systems.

http://djvulibre.djvuzone.org

Main Features of djvulibre:
view djvu files
convert any files (PDF, tiff, jpg etc) to djvu
convert multiple djvu to multiple tiff files
split djvu to multiple djvu files.