I followed the procedure described on the website of uninstalling Premiere CC, installing Premiere CS6, uninstalling it leaving Encore installed and reinstalling Premiere CC. I also installed the menu presets as described on another page of the website.
Encore loads and I try to create a new project specifying pathname and project name. Before I can do anything further, Encore exits with a windows dialogue about "Due to a problem the program must exit".
I did notice that some of the text boxes were filled in with values corresponding to old projects so Encore is picking up old configuration information from somewhere.