diff --git a/Icons/ass.ico b/Icons/ass.ico
index 9de387be4..637240b86 100644
Binary files a/Icons/ass.ico and b/Icons/ass.ico differ
diff --git a/Icons/dfxp.ico b/Icons/dfxp.ico
index 0ca0fabd0..8701a1593 100644
Binary files a/Icons/dfxp.ico and b/Icons/dfxp.ico differ
diff --git a/Icons/itt.ico b/Icons/itt.ico
new file mode 100644
index 000000000..b593f8649
Binary files /dev/null and b/Icons/itt.ico differ
diff --git a/Icons/sbv.ico b/Icons/sbv.ico
index 434716309..5cfd999a9 100644
Binary files a/Icons/sbv.ico and b/Icons/sbv.ico differ
diff --git a/Icons/smi.ico b/Icons/smi.ico
index a3dc317f0..c7c908790 100644
Binary files a/Icons/smi.ico and b/Icons/smi.ico differ
diff --git a/Icons/srt.ico b/Icons/srt.ico
index 283597de7..9f9fb402d 100644
Binary files a/Icons/srt.ico and b/Icons/srt.ico differ
diff --git a/Icons/ssa.ico b/Icons/ssa.ico
index 0e9ccd6d9..00994df57 100644
Binary files a/Icons/ssa.ico and b/Icons/ssa.ico differ
diff --git a/Icons/stl.ico b/Icons/stl.ico
index aff33fb7d..1bb412cd2 100644
Binary files a/Icons/stl.ico and b/Icons/stl.ico differ
diff --git a/Icons/sub.ico b/Icons/sub.ico
index b1e170082..c1de580ce 100644
Binary files a/Icons/sub.ico and b/Icons/sub.ico differ
diff --git a/Icons/sup.ico b/Icons/sup.ico
index d14caf369..2b5e2a916 100644
Binary files a/Icons/sup.ico and b/Icons/sup.ico differ
diff --git a/Icons/vtt.ico b/Icons/vtt.ico
index 09251e774..a06fbfc9d 100644
Binary files a/Icons/vtt.ico and b/Icons/vtt.ico differ
diff --git a/installer/Subtitle_Edit_installer.iss b/installer/Subtitle_Edit_installer.iss
index 234fe5b76..612d4f6c4 100644
--- a/installer/Subtitle_Edit_installer.iss
+++ b/installer/Subtitle_Edit_installer.iss
@@ -245,6 +245,8 @@ Source: ..\Icons\stl.ico;                          DestDir: {app}\Icons;
 Source: ..\Icons\sub.ico;                          DestDir: {app}\Icons;                              Flags: ignoreversion uninsneveruninstall onlyifdoesntexist; Components: main
 Source: ..\Icons\sup.ico;                          DestDir: {app}\Icons;                              Flags: ignoreversion uninsneveruninstall onlyifdoesntexist; Components: main
 Source: ..\Icons\vtt.ico;                          DestDir: {app}\Icons;                              Flags: ignoreversion uninsneveruninstall onlyifdoesntexist; Components: main
+Source: ..\Icons\smi.ico;                          DestDir: {app}\Icons;                              Flags: ignoreversion uninsneveruninstall onlyifdoesntexist; Components: main
+Source: ..\Icons\itt.ico;                          DestDir: {app}\Icons;                              Flags: ignoreversion uninsneveruninstall onlyifdoesntexist; Components: main
   
 #ifdef localize
 Source: {#bindir}\Languages\ar-EG.xml;             DestDir: {app}\Languages;                          Flags: ignoreversion; Components: translations
@@ -485,6 +487,16 @@ Root: HKCU ; Subkey: "Software\Classes\{#SetupSetting('AppName')}.vtt\shell\open
 Root: HKCU ; Subkey: "Software\Classes\.vtt"; ValueData: "{#SetupSetting('AppName')}.vtt"; Flags: uninsdeletevalue; ValueType: string; ValueName: ""; Check: DoSystemAssoc('vtt')
 Root: HKCU ; Subkey: "Software\Classes\{#SetupSetting('AppName')}.vtt\DefaultIcon"; ValueType: string; ValueName: ""; ValueData: "{app}\Icons\vtt.ico"; Check: DoSystemAssoc('vtt')
 
+Root: HKCU ; Subkey: "Software\Classes\{#SetupSetting('AppName')}.smi"; ValueData: "{app}\{#SetupSetting('AppExeName')}";  Flags: uninsdeletekey; ValueType: string; ValueName: ""; Check: DoSystemAssoc('smi')
+Root: HKCU ; Subkey: "Software\Classes\{#SetupSetting('AppName')}.smi\shell\open\command"; ValueData: """{app}\SubtitleEdit.exe"" ""%1""";  ValueType: string; ValueName: ""; Check: DoSystemAssoc('smi')
+Root: HKCU ; Subkey: "Software\Classes\.smi"; ValueData: "{#SetupSetting('AppName')}.smi"; Flags: uninsdeletevalue; ValueType: string; ValueName: ""; Check: DoSystemAssoc('smi')
+Root: HKCU ; Subkey: "Software\Classes\{#SetupSetting('AppName')}.smi\DefaultIcon"; ValueType: string; ValueName: ""; ValueData: "{app}\Icons\smi.ico"; Check: DoSystemAssoc('smi')
+
+Root: HKCU ; Subkey: "Software\Classes\{#SetupSetting('AppName')}.itt"; ValueData: "{app}\{#SetupSetting('AppExeName')}";  Flags: uninsdeletekey; ValueType: string; ValueName: ""; Check: DoSystemAssoc('itt')
+Root: HKCU ; Subkey: "Software\Classes\{#SetupSetting('AppName')}.itt\shell\open\command"; ValueData: """{app}\SubtitleEdit.exe"" ""%1""";  ValueType: string; ValueName: ""; Check: DoSystemAssoc('itt')
+Root: HKCU ; Subkey: "Software\Classes\.itt"; ValueData: "{#SetupSetting('AppName')}.itt"; Flags: uninsdeletevalue; ValueType: string; ValueName: ""; Check: DoSystemAssoc('itt')
+Root: HKCU ; Subkey: "Software\Classes\{#SetupSetting('AppName')}.itt\DefaultIcon"; ValueType: string; ValueName: ""; ValueData: "{app}\Icons\itt.ico"; Check: DoSystemAssoc('itt')
+
 ; Add .ass (Advanced SubStation Alpha) to the SE-supported file types
 Root: HKLM; Subkey: "{#keyApps}\SubtitleEdit.exe\SupportedTypes"; ValueType: string; ValueName: ".ass"; ValueData: ""; Check: HklmKeyExists('{#keyApps}')
 
@@ -671,6 +683,8 @@ begin
   DeleteFile(ExpandConstant('{app}\Icons\sub.ico'));
   DeleteFile(ExpandConstant('{app}\Icons\sup.ico'));
   DeleteFile(ExpandConstant('{app}\Icons\vtt.ico'));
+  DeleteFile(ExpandConstant('{app}\Icons\smi.ico'));
+  DeleteFile(ExpandConstant('{app}\Icons\itt.ico'));
   DelTree(ExpandConstant('{app}\Icons'), True, True, True);
   RemoveDir(ExpandConstant('{app}\Icons'));
   DelTree(ExpandConstant('{userappdata}\Subtitle Edit\Ocr\*.*'), False, True, False);