Thanks for taking the time to build this. I've tried it out and it sort of works. It does not remember the file that you were playing when you turn it off and the bookmark function does not record the time or the file, just 0:00, and when you go back to the bookmark page the next time you open it, the bookmarks are gone.
But.. if you reload a file that you were previously playing it remembers where it was when you closed the file. Since the pause/start button also serves as the file /open, when you come to the end of a file you have to close the program completely to select a new file, otherwise it just starts the file that you currently have loaded. This one drawback makes it almost impossible to use if you have an audiobook that is split int lots of small files as I haven't found a way to load multiple files yet.