The process to choose the application assigned to a document is not that long. You only need to access the document properties and change the application. But you should not have to. From PW Explorer you can right click to Open With and use any program. It should remain in the list once you've checked the "Always use this program" one time.
The document will open with the last "Always use this program" setting
The document will open with the last "Always use this program" setting