If you uninstall the Adobe photo program then it won't open with it anymore, it'll revert back to other apps.
To change the open with for file type right click on an image file, choose 'Open With' on the context menu then select Choose Program. Find the program you want in the list then check the always use the selected program... checkbox. If its not in the list browse for it.
If you don't see an Open With on the right click menu then hold down shift when you right click.