You are downloading the WinChan XAP file v188.8.131.52 for Windows Phone. WinChan is a free and useful Social app: Until personal app is completed, this is just a semi-maintained and updated version of 4charm. Most credit goes to Michael ... You can now download the offline XAP file to install & try it.
Download Locations for WinChan 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 WinChan XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.