Moon+ Reader App

Hi can anyone help I have been using the moon+reader app which was working very nicely until a few weeks ago all of a sudden it has now started to say when I try to open it. The application Moon+reader (Process com.flyer soft moonreader has stopped unexpectedly.Please try again. Force Close. I have uninstalled the app and reinstalled the app and even applied the update but alas it still. no longer works. I was thinking of buying the Pro version but as the free app does not work my faith in this app is some what misplaced
. Bob