KJV+ and legó are free to download and distribute. 
Runs online at www.helpware.net 
or download, unzip and run offline in a browser (no internet required).

Contact Robert Chandler 

* support@helpware.net
* Main dev site : https://www.helpwaregroup.com/contact


Recommendations: 

* This is a great site for bible studies using KJV+ Strongs Concordance. 

  https://youtu.be/yL7HgOkGw_s

* e-Sword is a full featured Bible application that includes KJV+ Strongs Concordance.
  Available for all devices and platforms. 
  I beleive the Windows version is still free (by donation). 

  https://e-sword.net/downloads.html