а вот если юник по кнопке
1) Copy appxbundle to windows phone
2) Enable “Sideload apps” or “Developer mode” setting By go to Setting>Update and Security > For developers.
3) Open “File Explorer ” app
4) Browse the installation folder(folder that just copied from your pc)
5) Click on .xap or .appxbundle
6) Wait and click on install to proceed the installation