1. Click the drop down beside your email ID and go to Settings.

2. Click Connect Dropbox.

3. Enter your Email associated to your Dropbox account and your Dropbox Password. Click Sign in.

4. Click Allow to allow and authorize ScriptVocalizer to access your Dropbox storage.

5. You will get a confirmation message in ScriptVocalizer saying "Dropbox Account successfully connected!". 

Also see, "Dropbox Connected! (Disconnect)" under Settings.