If I'm understanding your problem correctly, you need to change the default program for opening that kind of file.
Go to "control panel" and select "default programs"
Then select "associate a file type or protocol withe a program" (that can take a while to load up.)
Scroll down until you find the file extension of your embroidery format. Click on it to highlight and the click the change program button (top right) and choose the one you want.
Hope the picture helps.
Thanx so very much for the tutorial!!! I am not so computer savvy sometimes! I will follow this!!! Hope I can help you sometime! Hugs, Judy