I think I have found a bug in latest version. Every time I delete some of my uploaded images, I get the following exception when I rerun the program:
"An unexpected exception occurred: System.ArgumentException An argument is invalid"
To reproduce the problem:
1.- Select in Options menu "Delete pictures after they are uploaded to Flickr"
2.- Add some images to the queue
3.- Quit the program
4.- Upload the images via "schdedulr /upload" command line
5.- Open the program again