Just to point out, you should be aware that 4.x versions of Orbit Downloader may install "adware" or other unwanted softwares.
(From Softpedia.com)
And then there is, "# Orbit downloader 4.0 Introduce Software Updater".Reasons why this program is marked as ad-supported:
· Offers to change the homepage for web browsers installed on the system.
· Offers to download or install software or components (Grab Pro) that the program does not require to fully function
So be aware of what you select/deselect during installation.