Help How to restore standard attachment choice settings

[boncho]

Hi,
whenever I want to take a picture or attach a photo or file, I have to choose what app to use or where to find file, so far OK, but as I clicked a bit quick one day, I set Dropbox to be set as standard for where to get file attatchment from, so I cannot attatch file from anywhere else anymore.. How do I restore back to where I could choose where to get file every time?
There must be an easy way to deselct the "always choose" setting?

 

[OutOfPhase]

If you go to settings-apps select all, look for dropbox and select it. Scroll down and you will see preferences click it and remove the preference.

Good luck and if that does not work you can uninstall drop box and reinstall it from the play store.