nothing works this must be a bug!
You've been using BlitzPlus for three days. Don't you think it's a bit premature to be assuming that? And don't you think someone would have noticed by now if loading images didn't work?
If it isn't working, you have either the path or the filename wrong. \ and / might be the problem or it might be that you haven't saved the program to disk, and so it doesn't know the base directory.