In Lollipop, I was being asked for the app to be used for every action. For example, when I open a link, I was asked for the browser. When I have to select an image, I was asked about the app that would browse for images. This behavior is very convenient for me.
Now after upgrading to marshmallow, I get asked only once, and then that becomes the default. Meaning that if I do a mistake, I'm done. Now for the browser, I see the option for that in settings -> Default Apps. But for selecting images, I don't see that option. I selected ES file explorer for that and I'm stuck with that.
How can I change the default image selector app, or even better, how can I be always asked every time I do an action that requires anything that has multiple apps that can do it, just like it was on lollipop?