Install .issig files. No yet tested.

issig.bat

@@ -5,7 +5,7 @@ rem  Copyright (C) 1997-2024 Jordan Russell
 rem  Portions by Martijn Laan
 rem  For conditions of distribution and use, see LICENSE.TXT.
 rem
-rem  Batch file to create .issig files required by Inno Setup
+rem  Batch file to create .issig files required by Inno Setup (and delete any unwanted ones)
 
 setlocal
 
@@ -31,6 +31,8 @@ rem -------------------------------------------------------------------------
 
 cd Files
 if errorlevel 1 goto failed
+del *.issig
+if errorlevel 1 goto failed
 ISSigTool sign isbzip.dll ISCmplr.dll islzma.dll ISPP.dll isscint.dll iszlib.dll
 if errorlevel 1 goto failed
 cd ..

setup.iss

@@ -191,6 +191,7 @@ Source: "Examples\MyDll\Delphi\MyDll.dpr"; DestDir: "{app}\Examples\MyDll\Delphi
 #endif
 Source: "files\{#isppdll}"; DestName: "ISPP.dll"; DestDir: "{app}"; Flags: ignoreversion signonce touch
 Source: "files\ISPPBuiltins.iss"; DestDir: "{app}"; Flags: ignoreversion touch
+Source: "files\*.issig"; DestDir: "{app}"; Flags: ignoreversion touch
 
 [INI]
 Filename: "{app}\isfaq.url"; Section: "InternetShortcut"; Key: "URL"; String: "https://jrsoftware.org/isfaq.php"