You are downloading the Tether-X Pro XAP file v188.8.131.52 for Windows Phone. Tether-X Pro is a free and useful Productivity app: Tether-X Pro helps you turn your phone into a Wi-Fi hotspot. By configuring a few settings in your computer, you can take advantage of the big screen ... You can now download the offline XAP file to install & try it.
Download Locations for Tether-X Pro 184.108.40.206 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 Tether-X Pro XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.