You are downloading the Guitarist's Reference AppX file v188.8.131.52 for Windows Phone. Guitarist's Reference is a free and useful Music app: ALL-IN-ONE Package: Guitar Chords, Chord Progressions, Scales, Triads, Arpeggios, Notes On The Fretboard, Reverse Chord Finder Tool, Chord Quiz, ... You can now download the offline AppX file to install & try it.
Download Locations for Guitarist's Reference 184.108.40.206 AppX file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline AppX 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 Guitarist's Reference AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.