Make sure you understand what this change means.
If you have to restore from a Time-machine backup, you will be updated without consent.
There will be an artifact from this, in that the original “Dropbox” heading on the left side of the Finder will point to the wrong location, and give errors.
You can read through my problems with it here.
You will want to right-click the Dropbox heading and remove it, and use the rebuilt link that points to the new location. It has caused me no small amount of confusion.