the image you have at present is the official image from VU+ themselves which can be directly downloaded from there official website, i have a very similar setup apart from the VboxII i use a Gbox V3000. The intial setup is laways going to be time consuming as you have to setup the service searching menu to advanced and then put all your pre stored positions into the box once done though and you have everything as you like it you can either do a full backup of the whole image and save it in case of any mishaps, Personally i use blackhole image and use the full backup and personal settings backup so basically if a new BH image appears i can flash that and use the personal backup to restore all my Gbox settings.
I am afraid there is no backup utility on the official image unless you can download a plugin to do a personal backup, It may be a pain but your better off writing all your stored positions and corresponding numbers on a piece of paper and flashing a new image preferably one that allows you to at least do a personal backup.