PDF Architect 8 cant print multiple files and merge them?

I am a longtime PDF Architect user (since 2010). I have been using version 4 for many years. I love the feature where I can print many files and merge them into one PDF. I recently purchased version 8 for my new computer and I cannot do this. Every time I print a new document it opens a new PDF window asking me to save it individually. What am I doing wrong or can Architect 8 not do this?