diff --git a/FlightGear.iss b/FlightGear.iss
index 66eef23..136b09c 100755
--- a/FlightGear.iss
+++ b/FlightGear.iss
@@ -43,6 +43,7 @@ AppPublisherURL=http://www.flightgear.org
 AppSupportURL=http://www.flightgear.org
 AppUpdatesURL=http://www.flightgear.org
 DefaultDirName={pf}\FlightGear {#FGVersion}
+UsePreviousAppDir=no
 DefaultGroupName=FlightGear {#FGVersion}
 LicenseFile=X:\flightgear\COPYING
 Uninstallable=yes