Why do I have ads?

I paid for the no ads version and it worked fine for months. Then I had a problem when I would turn on the app, it would shut right down so I deleted the app and reloaded it. Well, that fixed the shut down problem but now I have ads, lots of ads, all the time and I dont know how to get rid of them, remember, I paid to NOT have ads!! HELP!!

RonfromFL about Wave Alarm - Motion Control Alarm Clock