I'm not completely sure I understand correctly, but try this:

1) Open Embird, it should open on the Manager screen.
2) Choose the Options Menu at the top
3) Associate Extensions

This will open a screen where all the possible file extensions are listed on the left side, and you can tell it which program to use to open selected types of files.

Let me know if that isn't what you're looking for and I'll try to help you figure it out. After you change any of those associations, you might need to reboot your computer, or at least close out any embroidery software and relaunch the programs. Good luck!

Laura

In addition to Laura's suggestion, you can open any explorer window, such as My Computer, then click tools, then folder options, then the file types tab.