Hey Virtual,
Try XnConvert, it's freeware and it has support with .411 files: https://www.xnview.com/en/xnconvert/#downloads
Let me know if this works or not, good luck.
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.