I purchased and installed this item Flexistarter 10.5.1 last January 2013 and the dongle is not working or the software quit reading the serial number. When I open flexistarter 10 it tells me "Cannot Find Security Key That Matches The Password". I use this product every day and I havent installed any new software. What Do I need to do? I have never in my 22 years of having software for cutting have had this issue. How do I fix this is my question.