Hi, I have the lite version of Flashcards Deluxe installed on my iPad. I had 4 decks, the introduction, chemistry, biology and physics. I think the limit for the lite version is 4 decks. My physics deck is gone, and whenever I try to click on it it says 'Please add cards to the deck before entering study mode'. I made up to 4 cards of text but they have all gone.

The information entered on this deck was vital and I am desperate to get it back, could someone please tell me how this happened? (I definitely did not delete any cards in the deck, individually) and how I can, if possible, get this information/my cards back? Thanks!