Update 2 1 installation

2-1-installation.md

@@ -18,6 +18,8 @@ Mirae WAVE will be started at the end of successful installation. You can also s
 
 ![](img/2-1-3-run.png)
 
+Note that you can use Mirae WAVE without any cost for 14 days of evaluation period. Mirae WAVE will still work even after the evaluation period expires, but a transparent watermark image will show up on top of screen and some features will be restricted. If you want all the features of Mirae WAVE without any restriction, you have to purchase a [license](2-3-license).
+
 ### FAQ
 
 * You can update Mirae WAVE any time, by downloading & installing the latest version.