is there a basic user guide for the android mobile app? It drives me crazy. I will use the passage guide and look in a commentary then I can't get back to the passage guide so I have to start over, look at another commentary and then start over again. Repeat . I found out I have 80 some pages open and I don't know how I did that but I still can't find my passage guide. How does this all work; how can I close all these pages. Thanks.