Update README.md

README.md

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 The ultimate Windows DNS changer tool (using netsh).  
 Find the fastest DNS servers and use them in just few mouse clicks!
 
-![](https://i.imgur.com/NfxQ1u2.png)
-![](https://i.imgur.com/SqWfles.png)
+![Zaczero/DNSChanger UI showcase](https://github.com/Zaczero/DNSChanger/blob/master/resources/showcase.png)
+![Zaczero/DNSChanger UI showcase - DNS change detected](https://github.com/Zaczero/DNSChanger/blob/master/resources/showcase_change.png)
 
 Have you ever wondered how much time you can save just by changing the DNS servers? Let's say that you can save ~30ms per request. You typically send around 2000 of them per day.
 
@@ -21,8 +21,13 @@ You are going to save even 6 hours per year!
 * Reset to ISP's default DNS
 * DNS validation on Windows boot
 * Native IPv4 + IPv6 support using netsh
+* Windows 10 theme sync
 * Completely open-source
 
+### Dark mode preview (Windows 10)
+
+![Zaczero/DNSChanger UI showcase](https://github.com/Zaczero/DNSChanger/blob/master/resources/showcase_dark.png)
+
 ## Download
 
 * https://github.com/Zaczero/DNSChanger/releases/latest