diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1c573bec4f..664523e089 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -96,7 +96,7 @@ jobs:
           top_dir=$PWD &&
           cd "${{ matrix.directory }}" &&
           MAKEFLAGS=-j8 makepkg-mingw -s --noconfirm &&
-          artifacts="$(basename "${{ matrix.directory }}")-artifacts" &&
+          artifacts="$(basename "${{ matrix.directory }}")-artifacts-${{ matrix.architecture.name }}" &&
           mkdir -p "$top_dir/$artifacts" &&
           mv *.tar.* "$top_dir/$artifacts"/ &&
           echo "result=$artifacts" >>$GITHUB_OUTPUT
@@ -158,7 +158,7 @@ jobs:
         shell: bash
         id: build
         run: |
-          artifacts="$(basename "${{ matrix.directory }}")-artifacts" &&
+          artifacts="$(basename "${{ matrix.directory }}")-artifacts-${{ matrix.architecture.name }}" &&
           mkdir -p "$artifacts" &&
           ./"${{ matrix.directory }}"/release.sh --output="$PWD/$artifacts/" 0-test &&
           echo "result=$artifacts" >>$GITHUB_OUTPUT
diff --git a/installer/InnoSetup/ISCC.exe b/installer/InnoSetup/ISCC.exe
index f461e37972..a2e4b4350c 100755
Binary files a/installer/InnoSetup/ISCC.exe and b/installer/InnoSetup/ISCC.exe differ
diff --git a/installer/InnoSetup/ISCmplr.dll b/installer/InnoSetup/ISCmplr.dll
index 40379518ee..f9a08cefd9 100644
Binary files a/installer/InnoSetup/ISCmplr.dll and b/installer/InnoSetup/ISCmplr.dll differ
diff --git a/installer/InnoSetup/ISCmplr.dll.issig b/installer/InnoSetup/ISCmplr.dll.issig
new file mode 100644
index 0000000000..a3d27de415
--- /dev/null
+++ b/installer/InnoSetup/ISCmplr.dll.issig
@@ -0,0 +1,6 @@
+format issig-v1
+file-size 1552016
+file-hash 2c230c3e99bc42215221b2c847356fbbe9eae33a15a842be429e94fd26e7c436
+key-id def020edee3c4835fd54d85eff8b66d4d899b22a777353ca4a114b652e5e7a28
+sig-r c41f0498b857eb9b0c2db7bc4b26ee48fd9bf625d833f601455b8a3e01222e8a
+sig-s 37bcddd584ca932ed1a534bbdff4e2d3834eb932b0b78e53b1505965c14a3232
diff --git a/installer/InnoSetup/ISPP.dll b/installer/InnoSetup/ISPP.dll
index 6eea424a55..96ce46785c 100644
Binary files a/installer/InnoSetup/ISPP.dll and b/installer/InnoSetup/ISPP.dll differ
diff --git a/installer/InnoSetup/ISPP.dll.issig b/installer/InnoSetup/ISPP.dll.issig
new file mode 100644
index 0000000000..6de593996c
--- /dev/null
+++ b/installer/InnoSetup/ISPP.dll.issig
@@ -0,0 +1,6 @@
+format issig-v1
+file-size 999568
+file-hash df4a8792bc1994d67b5ca9366d8e4e531d11511bf1013fe18fd0236b1caa6edf
+key-id def020edee3c4835fd54d85eff8b66d4d899b22a777353ca4a114b652e5e7a28
+sig-r 357cf38ea6e369ef8165ac3fe16c725406de51239043befc2b56ceb0dfba4984
+sig-s a5f131ab68e0b4b8e390167b9be445ed3377a5fe2c8098eb73c393674ddc98c1
diff --git a/installer/InnoSetup/ISSigTool.exe b/installer/InnoSetup/ISSigTool.exe
new file mode 100644
index 0000000000..88a18e5b19
Binary files /dev/null and b/installer/InnoSetup/ISSigTool.exe differ
diff --git a/installer/InnoSetup/ISetup-dark.chm b/installer/InnoSetup/ISetup-dark.chm
index 2aafeb376e..e5d89490fd 100644
Binary files a/installer/InnoSetup/ISetup-dark.chm and b/installer/InnoSetup/ISetup-dark.chm differ
diff --git a/installer/InnoSetup/ISetup.chm b/installer/InnoSetup/ISetup.chm
index 4ef969b24f..4fa7f8f340 100644
Binary files a/installer/InnoSetup/ISetup.chm and b/installer/InnoSetup/ISetup.chm differ
diff --git a/installer/InnoSetup/Setup.e32 b/installer/InnoSetup/Setup.e32
index a1d3544ca4..15efbedcf0 100644
Binary files a/installer/InnoSetup/Setup.e32 and b/installer/InnoSetup/Setup.e32 differ
diff --git a/installer/InnoSetup/SetupLdr.e32 b/installer/InnoSetup/SetupLdr.e32
index f7b9ac863a..984be5fbfe 100644
Binary files a/installer/InnoSetup/SetupLdr.e32 and b/installer/InnoSetup/SetupLdr.e32 differ
diff --git a/installer/InnoSetup/isbzip.dll.issig b/installer/InnoSetup/isbzip.dll.issig
new file mode 100644
index 0000000000..7c0b124da0
--- /dev/null
+++ b/installer/InnoSetup/isbzip.dll.issig
@@ -0,0 +1,6 @@
+format issig-v1
+file-size 39200
+file-hash 8072e83385afc4a84006271a87a11fc0a22b149cbd77322669ca56c470d28ced
+key-id def0147c3bbc17ab99bf7b7a9c2de1390283f38972152418d7c2a4a7d7131a38
+sig-r c5d2720f9be49d87c4800bd8717066613173fae1e26ffb9f31f304a1be40e71e
+sig-s c68f97d069e34e7b2b410222032401254c35641d293ebf3fa0078d19b3478db4
diff --git a/installer/InnoSetup/islzma.dll.issig b/installer/InnoSetup/islzma.dll.issig
new file mode 100644
index 0000000000..486f495368
--- /dev/null
+++ b/installer/InnoSetup/islzma.dll.issig
@@ -0,0 +1,6 @@
+format issig-v1
+file-size 135816
+file-hash b252471e95f0853902b15ae71a90574f9b168f8d4a0c474b20537511f90220a5
+key-id def0147c3bbc17ab99bf7b7a9c2de1390283f38972152418d7c2a4a7d7131a38
+sig-r 63d9a298fdb44394705221a9e65d1fb459d20c73d26aa56cdacf8d0942896b64
+sig-s f7621fc374e28c22f21fcb0ce77acf8a6723c5d0934e6aa0f5a718afeea6cfb3
diff --git a/installer/InnoSetup/isscint.dll.issig b/installer/InnoSetup/isscint.dll.issig
new file mode 100644
index 0000000000..bc9893869a
--- /dev/null
+++ b/installer/InnoSetup/isscint.dll.issig
@@ -0,0 +1,6 @@
+format issig-v1
+file-size 795776
+file-hash 5ae5dcd47ae9cd0929e0d6b2591e2ecc14cb8dfe4e04fb37a6cef5f1896edd11
+key-id def0147c3bbc17ab99bf7b7a9c2de1390283f38972152418d7c2a4a7d7131a38
+sig-r dd7de5a0ea422c67375023d74c410973a8508a054d6675710a2e591d7b33abdd
+sig-s 0bd08ccdb7f69a97b3e390a28dfdda98a1cad50f11682567fa03b93c7c5fb285
diff --git a/installer/InnoSetup/iszlib.dll.issig b/installer/InnoSetup/iszlib.dll.issig
new file mode 100644
index 0000000000..4db9aa2f3e
--- /dev/null
+++ b/installer/InnoSetup/iszlib.dll.issig
@@ -0,0 +1,6 @@
+format issig-v1
+file-size 34592
+file-hash 14c0d4a2a41572384f8309cdf03de5c6e7ed46bef64cce70d989b2665eff1a47
+key-id def0147c3bbc17ab99bf7b7a9c2de1390283f38972152418d7c2a4a7d7131a38
+sig-r e245c707db5d1f1d3f47226aa3923e0240e23abb8fa5077eb4fb7ffc776a89ff
+sig-s bf84dbda5c76cce509931aa05bdd9992f96154f9493345e7f1669e169f0b810c
diff --git a/installer/InnoSetup/whatsnew.htm b/installer/InnoSetup/whatsnew.htm
index fce7763b62..6c8f5e05b9 100644
--- a/installer/InnoSetup/whatsnew.htm
+++ b/installer/InnoSetup/whatsnew.htm
@@ -29,11 +29,20 @@
 
 <p><b>Want to be notified by e-mail of new Inno Setup releases?</b> <a href="ismail.php">Subscribe</a> to the Inno Setup Mailing List!</p>
 
+<p><a name="6.4.3"></a><span class="ver">6.4.3 </span><span class="date">(2025-05-03)</span></p>
+<ul>
+  <li>Compiler IDE change: The editor now restores selections on undo and redo.</li>
+  <li>Inno Setup now includes a new command-line tool, ISSigTool.exe. This tool is designed to sign files using ECDSA P-256 cryptographic signatures. Compil32, ISCC, and ISCmplr use these signatures to verify a number of DLL files before loading them. This is a &quot;technology preview&quot; that is subject to change (e.g., any signatures you create now may have to be recreated when upgrading to the next version).<br />Note: ISSigTool.exe does not replace Microsoft's signtool.exe in any way and is in fact not related to Authenticode Code Signing at all.</li>
+  <li><i>Fix:</i> Autocomplete support for parameter names in the <tt>[Components]</tt> and <tt>[Dirs]</tt> sections was broken since 6.1.1.</li>
+  <li><i>Fix:</i> Pascal Scripting support function <tt>Extract7ZipArchive</tt> which was introduced by 6.4.0 would fail with error 11 on older versions of Windows, at least Windows 8.1 and Windows Server 2016.</li>
+  <li>Minor tweaks and documentation improvements.</li>
+</ul>
+
 <p><a name="6.4.2"></a><span class="ver">6.4.2 </span><span class="date">(2025-03-12)</span></p>
 <ul>
   <li>Added <tt>[Setup]</tt> section directive <tt>CloseApplicationsFilterExcludes</tt>.</li>
   <li>Inno Setup is now built using Delphi 12.1 Athens instead of Delphi 11.3 Alexandria.</li>
-  <li>Inno Setup is now signed using a new code signing certificate. The publisher name on this new certificate, Pyrsys B.V., is a company owned by Inno Setup co-developer Martijn Laan.</li>
+  <li>Inno Setup is now signed using a new code signing certificate.</li>
 </ul>
 
 <p><a name="6.4.1"></a><span class="ver">6.4.1 </span><span class="date">(2025-02-12)</span></p>