I am so sorry to ask this - being new to the community, but I've been struggling with this problem for 5 days now and still no working solution. I think it's time to ask for help.
I'm trying to navigate into a folder I have listed as "Articles". From there I'd like to select the first file (they're all in .pdf format) that appears within that folder (I know there are different ways to sort it - but really the order in which they're opened makes no difference) and open it with an application called "GhostReader Plus".
Can anyone help me with this? It's probably a real simple solution, but being a total newb, I'm hitting a wall.