Mobi office automatically downloads from App Store and overrides Microsoft Word print options

I have an iPad updated to the latest iOS. I have a subscription to Microsoft office. It used to be when I created a document. It was a simple matter to print the document. Now, whenever I try to print my iPad,it automatically downloads Mobi office from the App Store and opens it for printing. And Moby office wants me to pay for the right to print a word document from my iPad.