Update README.md

README.md

@@ -21,8 +21,8 @@ Copyright ©2019
 
 [DES V.1.7 latest release ](https://edp-portal.eurac.edu/downloads/DES.tar.gz)
 
-DES software is Free to use as individual and as company, but requires and activation key. 
-You can simply request it by writing to the following mail-box:  
+DES software is Free to use as individual and for commercial purposes, but requires an activation key. 
+You can simply request a license key for free by writing to the following mail-box: 
 
 [supportcss@eurac.edu](mailto:supportcss@eurac.edu)