Thanks for this excellent plugin.
It would be good if all the basic Description metadata in Windows Explorer properties were supported: eg: Rating, Tags, Comments, Date Taken, Date Acquired are not preserved.
Also, the metadata that is supported is not being written to the file in Unicode (where the source file is Unicode). So, when I convert a TIFF to JPEG XR that is mixed Japanese/English, the Japanese characters turn out as "?????" in the result.