I have been having problems with this since the latest Dropbox upgrade. If it's running all the time, it uses bandwidth. Before the latest upgrade, I scheduled Dropbox to open in the evening when my satellite bandwidth was cheaper and then closed it before the "anytime allowance" started. Now, since it's no longer an app, once Dropbox is opened, my automatic scheduled close has to be done manually. And NOW, Dropbox keeps updating itself in the middle of the afternoon, suddenly using up about 200MB, without the application even being open. I would like Dropbox to update when I have it auto open in the wee hours of the morning. Not at any hour the company wants to send an update. I have a business account with my work as well, or I'd simply delete the Dropbox program on my computer. Other software applications allow for scheduled updates. Why is this not an option with you? It's very inconsiderate of those of us with limited satellite bandwidth. Please make this an option: to not have Dropbox bandwidth activity during daylight hours. Thank you!
The Dropbox desktop application isn’t the only app running on your machine when you install it; there is a also a separate service to update the app to the latest version.
You can check in your task manager on your OS to see which service it is and place that process in your scheduler to see if this helps. On Mac devices it is DropboxMacUpdate, while on Windows it is Dropbox Update.