You are downloading the Background Designer XAP file v188.8.131.52 for Windows Phone. Background Designer is a free and useful Productivity app: App development stopped! But you can still try and use it. Works actually great at this stage.There may be a new version of this app in the ... You can now download the offline XAP file to install & try it.
Download Locations for Background Designer 184.108.40.206 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Background Designer XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.