Hi. I have Dropbox on my Samsung Galaxy S6, but I rarely use it. Suddenly, it is being used to open all my downloads. I do not want this. I would just delete the app, but i have a file on it that i want, and i am worried that because it's now linked to my downloads that they might disappear. Could not find a way to change this. Clearly, I am not savvy. Anybody? Thanks.