organizer issues

I have tried to input my folders into the program twice,first time perfectly second time a diaster. The second time I followed tje prompts and it opened the folder for me to select an image.The first time it just highlighted the folder name and allowed me to go to the next folder and select and it highlighted te second.This time when I do it the folder opens and all the images are shone,as if I wanted to select a single image.That never happened the first time,did I not do something correct? Also when I select a folder and it opens can I select all files instead of going to each one and highlighting them.