--- C:/Users/bkloster/AppData/Local/QtMsBuild/qt.props	Do Aug 29 08:39:37 2019
+++ C:/Users/bkloster/AppData/Local/QtMsBuild/qt - Kopie.props	Do Aug 29 08:43:47 2019
@@ -77 +77 @@
-    <QtInstallDir Condition="!Exists('$(QtInstallRegDir)')"
+    <QtInstallDir Condition="!Exists('$(QtInstallDir)')"