I am new to Android OS and any help with Moon+Reader pro will be appreciated. I started with the free version and sync'd books from my PC stored in Calibre. Everything worked fine, reading and operating M+R was no broblem until I decided to buy the Pro version to eliminate the adverts. Having installed it I uninstalled the free version which is where the problem started, M+R Pro does not find the books, or more correctly does find the book files on the sd card (two copies) but does not import them into the reader to open. The choice offered is :/sdcard/Books/.MoonReader or local files Dropbox. I have only just installed Dropbox which contains no books to date.