Error "Unable to refresh access token without refresh token and app key"

[DarkFox]

The token generated from the Dropbox dashboard seems to only last for a short time, causing the uploads to fail after that, as it doesn't have the info to create a new token.

Log:

[Info] Received message with command upload
Unable to refresh access token without                 refresh token and app key
[INFO] Found 10 file(s) to upload.
[DEBUG] Creating a Dropbox object.
[ERROR] Invalid access token; try re-generating an access token from the app console on the web.
[Info] Keep last option is set, cleaning up files...

[DarkFox]

@mikevansighem, @afewcc. Any chance you could take a look at this? In its current state, the add-on is not functional.