I become crazy , and I think I will give up!!!
I wanted to try with an old camera that I was able to make function well (and easily!!) with Wia-loader, for comparing the files on the cards… But impossible to have any suffix L or R with the imported pictures, only a "U"… I tried new and clean installation, on an other PC too, but no result, and an old version… Nothing to do.
I must be missing a huge thing, but impossible to see it, It was not difficult to have a good result the first time I used Wia-loader….
Thank you for your help!