You are downloading the WinChan XAP file v18.104.22.168 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 22.214.171.124 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try 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.