XnView Software

FYI, the zip file posted is pw protected and I am aware of this and have attempted to send the pw to Pierre via PM.

attaching sample files

Hoping that I am following this properly.
I downloaded xnView, as opposed to the MP version. I can confirm that I can view the test jb2 file that was uploaded.
However, i cannot view my jb2 files.
In trying to convert 3 sample files in xnview, it said the format of the file could not be determined ...

Probably I am doing something wrong, or these files just arent going to convert. Can you give me opinion on what I can try converting them to? Or anything I can try to even see if they are viewable. They have filesizes (meaning they are not empty files).
I put the .exe in the plugins folder.
I have ...

is this something I just execute on my whole computer, or is there some kind of plugin manager for xnview? or some special way or place it needs installed.

Thank you!
Giving this a try in the morning.

I would like assistance/information on how to batch convert jb2 files into either jpg or tif or even pdf files.
I have tons of these files. they were result of extracting embedded images out of original pdf files. I now need to convert them into some kind of image format commonly viewable in non ...