diff -r 04f1ac8a931b -r 0f9f7d6564cd src/RelpipeChartMainWindow.ui
--- a/src/RelpipeChartMainWindow.ui	Sun Nov 18 00:38:49 2018 +0100
+++ b/src/RelpipeChartMainWindow.ui	Thu Nov 29 22:30:12 2018 +0100
@@ -1,4 +1,21 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+	Relational pipes
+	Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)
+	
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+	
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+	
+	You should have received a copy of the GNU General Public License
+	along with this program. If not, see <http://www.gnu.org/licenses/>.
+-->
 <ui version="4.0">
  <class>RelpipeChartMainWindow</class>
  <widget class="QMainWindow" name="RelpipeChartMainWindow">