Update README.md

Author: spectralcode

README.md

@@ -5,7 +5,10 @@ FDMLControl enables the control of the [Optores](https://www.optores.com/) FDML
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-![screenshot](images/FDMLConrol_screenshotWin10.png)
+<p align="center">
+  <img src="images/FDMLConrol_screenshotWin10.png">
+</p>
+
 
 Features
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@@ -44,6 +47,5 @@ Tammo Ripken-  Industrial and Biomedical Optics Department, Laser Zentrum Hannov
 30419 Hannover, Germany
 
 
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 ## License
 FDMLControl is free software and licensed under GPLv3. See [LICENSE](LICENSE).