diff --git a/pkg/gpxsee64.nsi b/pkg/gpxsee64.nsi
index f519800f..a5498bd1 100644
--- a/pkg/gpxsee64.nsi
+++ b/pkg/gpxsee64.nsi
@@ -181,13 +181,14 @@ Section "GPXSee" SEC_APP
   !insertmacro FILE_ASSOCIATION_ADD "qct" "QuickChart Map File" 24
   !insertmacro FILE_ASSOCIATION_ADD "trk" "TwoNav Track File" 25
   !insertmacro FILE_ASSOCIATION_ADD "gemf" "GEMF Map File" 26
-  !insertmacro FILE_ASSOCIATION_ADD "kml" "Keyhole Markup Language" 27
-  !insertmacro FILE_ASSOCIATION_ADD "kmz" "KML geographic compressed data" 27
-  !insertmacro FILE_ASSOCIATION_ADD "fit" "Flexible and Interoperable Data Transfer" 28
-  !insertmacro FILE_ASSOCIATION_ADD "igc" "Flight Recorder Data Format" 29
-  !insertmacro FILE_ASSOCIATION_ADD "nmea" "NMEA 0183 Data" 30
-  !insertmacro FILE_ASSOCIATION_ADD "plt" "OziExplorer Track File" 31
-  !insertmacro FILE_ASSOCIATION_ADD "rte" "OziExplorer Route File" 32
+  !insertmacro FILE_ASSOCIATION_ADD "000" "IHO S-57 Electronic Navigation Chart" 27
+  !insertmacro FILE_ASSOCIATION_ADD "kml" "Keyhole Markup Language" 28
+  !insertmacro FILE_ASSOCIATION_ADD "kmz" "KML geographic compressed data" 28
+  !insertmacro FILE_ASSOCIATION_ADD "fit" "Flexible and Interoperable Data Transfer" 29
+  !insertmacro FILE_ASSOCIATION_ADD "igc" "Flight Recorder Data Format" 30
+  !insertmacro FILE_ASSOCIATION_ADD "nmea" "NMEA 0183 Data" 31
+  !insertmacro FILE_ASSOCIATION_ADD "plt" "OziExplorer Track File" 32
+  !insertmacro FILE_ASSOCIATION_ADD "rte" "OziExplorer Route File" 33
 
   WriteRegStr HKCR "Applications\GPXSee.exe\shell\open\command" "" "$\"$INSTDIR\GPXSee.exe$\" $\"%1$\""
   WriteRegStr HKCR ".gpx\OpenWithList" "GPXSee.exe" ""
@@ -237,6 +238,7 @@ Section "GPXSee" SEC_APP
   WriteRegStr HKCR ".qct\OpenWithList" "GPXSee.exe" ""
   WriteRegStr HKCR ".trk\OpenWithList" "GPXSee.exe" ""
   WriteRegStr HKCR ".gemf\OpenWithList" "GPXSee.exe" ""
+  WriteRegStr HKCR ".000\OpenWithList" "GPXSee.exe" ""
 
   System::Call 'shell32.dll::SHChangeNotify(i, i, i, i) v (0x08000000, 0, 0, 0)'
 
@@ -392,6 +394,7 @@ Section "Uninstall"
   !insertmacro FILE_ASSOCIATION_REMOVE "qct"
   !insertmacro FILE_ASSOCIATION_REMOVE "trk"
   !insertmacro FILE_ASSOCIATION_REMOVE "gemf"
+  !insertmacro FILE_ASSOCIATION_REMOVE "000"
 
   DeleteRegValue HKCR ".gpx\OpenWithList" "GPXSee.exe"
   DeleteRegValue HKCR ".tcx\OpenWithList" "GPXSee.exe"
@@ -440,6 +443,7 @@ Section "Uninstall"
   DeleteRegValue HKCR ".qct\OpenWithList" "GPXSee.exe"
   DeleteRegValue HKCR ".trk\OpenWithList" "GPXSee.exe"
   DeleteRegValue HKCR ".gemf\OpenWithList" "GPXSee.exe"
+  DeleteRegValue HKCR ".000\OpenWithList" "GPXSee.exe"
   DeleteRegKey HKCR "Applications\GPXSee.exe"   
   
   System::Call 'shell32.dll::SHChangeNotify(i, i, i, i) v (0x08000000, 0, 0, 0)'