You are downloading the WindUp XAP file v188.8.131.520 for Windows Phone. WindUp is a free and useful Social app: Create and share fun, temporary messages and media with friends using WindUp. Decide how long a message will last - set it to expire after a time or ... You can now download the offline XAP file to install & try it.
Download Locations for WindUp 184.108.40.2060 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline WindUp XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.