Acrobat Reader keeps asking me to accept the Distribution License Agreement every time I open a PDF

I'm hoping someone can help me with this as it's driving me crazy. As of a few months ago, every time I open a PDF with Adobe Acrobat Reader it asks me to accept the Distribution License Agreement for Use on Personal Computers. I don't understand why it's necessary to do this every single time I open a PDF. Surely there's a way of stopping this popping up every time?