My Product Data Disappeared

I have been using Moon Invoice Pro for several months now, just the free version to try it out. I mostly use this app to generate purchase orders for a supplier. It has been working fine until today, when I added a few more products into the list, all of a sudden all my products disappeared from the list and it is currently showing only 2 products (the last two I added) on it. The previouos purchase orders and invoices are still there but they are all blank lists with a grand total of the correct amount. I shot an email to support, am still waiting on an answer. Needless to say, I am very disappointed. To the support staff, if you are reading this, please fix it for me? Thanks.

Archelium about Moon Invoice - Easy Bill Maker, v1.5.4