PDF Architect Remove as Default for PDF

After I installed PDF Architect it set itself up as default for pdf files opened in my browser. I do not want this. I was perfectly happy with Acrobat. PDF  Architect is slow to load and I do not need its functionality when I look at web documents. The only reason to get it in the first palace was to fix a few pdf files. It is not supposed to take over the entire pdf viewing and printing process. I would much rather have pdf creator handle the printing process. How to remove pdf architect from its iron grip, it seems, of pdf files?