diff --git a/src/gtk/config/AboutTab.cpp b/src/gtk/config/AboutTab.cpp
index 620414fad..4502938d0 100644
--- a/src/gtk/config/AboutTab.cpp
+++ b/src/gtk/config/AboutTab.cpp
@@ -39,7 +39,7 @@ using std::string;
 #  include "librpbase/crypto/AesNettle.hpp"
 #endif /* ENABLE_DECRYPTION && HAVE_NETTLE */
 #ifdef ENABLE_XML
-#  include <tinyxml2.h>
+#  include <pugixml.hpp>
 #endif /* ENABLE_XML */
 
 #if GTK_CHECK_VERSION(3, 0, 0)
@@ -728,24 +728,38 @@ rp_about_tab_init_libraries_tab(GtkLabel *lblLibraries)
 	}
 #endif /* ENABLE_DECRYPTION && HAVE_NETTLE */
 
-	/** TinyXML2 **/
+	/** PugiXML **/
 #ifdef ENABLE_XML
+	// PugiXML 1.10 and later uses this format: 1140 == 1.14.0
+	// PugiXML 1.9 and earlier uses this format: 190 == 1.9.0
+	unsigned int pugixml_major, pugixml_minor, pugixml_patch;
+	if (PUGIXML_VERSION >= 1000) {
+		pugixml_major = PUGIXML_VERSION / 1000;
+		pugixml_minor = (PUGIXML_VERSION % 1000) / 10;
+		pugixml_patch = PUGIXML_VERSION  % 10;
+	} else {
+		pugixml_major = PUGIXML_VERSION / 100;
+		pugixml_minor = (PUGIXML_VERSION % 100) / 10;
+		pugixml_patch = PUGIXML_VERSION % 10;
+	}
+
 	sLibraries += "\n\n";
-	const string tinyXml2Version = fmt::format(FSTR("TinyXML2 {:d}.{:d}.{:d}"),
-		static_cast<unsigned int>(TIXML2_MAJOR_VERSION),
-		static_cast<unsigned int>(TIXML2_MINOR_VERSION),
-		static_cast<unsigned int>(TIXML2_PATCH_VERSION));
+	string pugiXmlVersion = fmt::format(FSTR("PugiXML {:d}.{:d}"),
+		pugixml_major, pugixml_minor);
+	if (pugixml_patch > 0) {
+		pugiXmlVersion += fmt::format(FSTR(".{:d}"), pugixml_patch);
+	}
 
 #  if defined(USE_INTERNAL_XML) && !defined(USE_INTERNAL_XML_DLL)
-	sLibraries += fmt::format(FRUN(sIntCopyOf), tinyXml2Version);
+	sLibraries += fmt::format(FRUN(sIntCopyOf), pugiXmlVersion);
 #  else
 	// FIXME: Runtime version?
-	sLibraries += fmt::format(FRUN(sCompiledWith), tinyXml2Version);
+	sLibraries += fmt::format(FRUN(sCompiledWith), pugiXmlVersion);
 #  endif
 	sLibraries += "\n"
-		"Copyright (C) 2000-2021 Lee Thomason\n"
-		"<a href='http://www.grinninglizard.com/'>http://www.grinninglizard.com/</a>\n";
-	sLibraries += fmt::format(FRUN(sLicense), "zlib license");
+		"Copyright (C) 2006-2025, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)\n"
+		"<a href='https://pugixml.org/'>https://pugixml.org/</a>\n";
+	sLibraries += fmt::format(FRUN(sLicense), "MIT license");
 #endif /* ENABLE_XML */
 
 	/** GNU gettext **/
diff --git a/src/gtk/gtk3/CMakeLists.txt b/src/gtk/gtk3/CMakeLists.txt
index d49eaeb8e..d32020e57 100644
--- a/src/gtk/gtk3/CMakeLists.txt
+++ b/src/gtk/gtk3/CMakeLists.txt
@@ -174,6 +174,9 @@ IF(BUILD_GTK3)
 
 	TARGET_COMPILE_DEFINITIONS(${PROJECT_NAME} PRIVATE RP_UI_GTK3)
 
+	# PugiXML headers are needed for AboutTab.
+	TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PRIVATE ${pugixml_INCLUDE_DIR})
+
 	# libfmt
 	IF(Fmt_FOUND)
 		TARGET_LINK_LIBRARIES(${PROJECT_NAME} PRIVATE ${Fmt_LIBRARY})
diff --git a/src/gtk/gtk4/CMakeLists.txt b/src/gtk/gtk4/CMakeLists.txt
index 829c30d48..934d58b39 100644
--- a/src/gtk/gtk4/CMakeLists.txt
+++ b/src/gtk/gtk4/CMakeLists.txt
@@ -153,6 +153,9 @@ IF(BUILD_GTK4)
 
 	TARGET_COMPILE_DEFINITIONS(${PROJECT_NAME} PRIVATE RP_UI_GTK4)
 
+	# PugiXML headers are needed for AboutTab.
+	TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PRIVATE ${pugixml_INCLUDE_DIR})
+
 	# libfmt
 	IF(Fmt_FOUND)
 		TARGET_LINK_LIBRARIES(${PROJECT_NAME} PRIVATE ${Fmt_LIBRARY})
diff --git a/src/gtk/xfce/CMakeLists.txt b/src/gtk/xfce/CMakeLists.txt
index 913c2c705..217ac437b 100644
--- a/src/gtk/xfce/CMakeLists.txt
+++ b/src/gtk/xfce/CMakeLists.txt
@@ -153,6 +153,9 @@ IF(BUILD_XFCE)
 	ADD_DEFINITIONS(${GTK2_DEFINITIONS})
 	TARGET_COMPILE_DEFINITIONS(${PROJECT_NAME} PRIVATE RP_UI_XFCE)
 
+	# PugiXML headers are needed for AboutTab.
+	TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PRIVATE ${pugixml_INCLUDE_DIR})
+
 	# libfmt
 	IF(Fmt_FOUND)
 		TARGET_LINK_LIBRARIES(${PROJECT_NAME} PRIVATE ${Fmt_LIBRARY})
diff --git a/src/kde/config/AboutTab.cpp b/src/kde/config/AboutTab.cpp
index c66ca4198..65cf9b2f3 100644
--- a/src/kde/config/AboutTab.cpp
+++ b/src/kde/config/AboutTab.cpp
@@ -45,7 +45,7 @@ using std::string;
 #  include "librpbase/crypto/AesNettle.hpp"
 #endif /* ENABLE_DECRYPTION && HAVE_NETTLE */
 #ifdef ENABLE_XML
-#  include <tinyxml2.h>
+#  include <pugixml.hpp>
 #endif /* ENABLE_XML */
 
 #include "ui_AboutTab.h"
@@ -480,24 +480,38 @@ void AboutTabPrivate::initLibrariesTab(void)
 	}
 #endif /* ENABLE_DECRYPTION && HAVE_NETTLE */
 
-	/** TinyXML2 **/
+	/** PugiXML **/
 #ifdef ENABLE_XML
+	// PugiXML 1.10 and later uses this format: 1140 == 1.14.0
+	// PugiXML 1.9 and earlier uses this format: 190 == 1.9.0
+	unsigned int pugixml_major, pugixml_minor, pugixml_patch;
+	if (PUGIXML_VERSION >= 1000) {
+		pugixml_major = PUGIXML_VERSION / 1000;
+		pugixml_minor = (PUGIXML_VERSION % 1000) / 10;
+		pugixml_patch = PUGIXML_VERSION  % 10;
+	} else {
+		pugixml_major = PUGIXML_VERSION / 100;
+		pugixml_minor = (PUGIXML_VERSION % 100) / 10;
+		pugixml_patch = PUGIXML_VERSION % 10;
+	}
+
 	sLibraries += BR BR;
-	const string tinyXml2Version = fmt::format(FSTR("TinyXML2 {:d}.{:d}.{:d}"),
-		static_cast<unsigned int>(TIXML2_MAJOR_VERSION),
-		static_cast<unsigned int>(TIXML2_MINOR_VERSION),
-		static_cast<unsigned int>(TIXML2_PATCH_VERSION));
+	string pugiXmlVersion = fmt::format(FSTR("PugiXML {:d}.{:d}"),
+		pugixml_major, pugixml_minor);
+	if (pugixml_patch > 0) {
+		pugiXmlVersion += fmt::format(FSTR(".{:d}"), pugixml_patch);
+	}
 
 #  if defined(USE_INTERNAL_XML) && !defined(USE_INTERNAL_XML_DLL)
-	sLibraries += fmt::format(FRUN(sIntCopyOf), tinyXml2Version);
+	sLibraries += fmt::format(FRUN(sIntCopyOf), pugiXmlVersion);
 #  else
 	// FIXME: Runtime version?
-	sLibraries += fmt::format(FRUN(sCompiledWith), tinyXml2Version);
+	sLibraries += fmt::format(FRUN(sCompiledWith), pugiXmlVersion);
 #  endif
 	sLibraries += BR
-		"Copyright (C) 2000-2021 Lee Thomason" BR
-		"<a href='http://www.grinninglizard.com/'>http://www.grinninglizard.com/</a>" BR;
-	sLibraries += fmt::format(FRUN(sLicense), "zlib license");
+		"Copyright (C) 2006-2025, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)" BR
+		"<a href='https://pugixml.org/'>https://pugixml.org/</a>" BR;
+	sLibraries += fmt::format(FRUN(sLicense), "MIT license");
 #endif /* ENABLE_XML */
 
 	/** GNU gettext **/
diff --git a/src/kde/kde4/CMakeLists.txt b/src/kde/kde4/CMakeLists.txt
index db99a7fa4..7b34c6b06 100644
--- a/src/kde/kde4/CMakeLists.txt
+++ b/src/kde/kde4/CMakeLists.txt
@@ -116,11 +116,14 @@ IF(BUILD_KDE4)
 	TARGET_LINK_LIBRARIES(${PROJECT_NAME} PRIVATE romdata)
 	TARGET_LINK_LIBRARIES(${PROJECT_NAME} PUBLIC ${KDE4_KFILE_LIBRARY} ${KDE4_KDEUI_LIBRARY} ${KDE4_KDECORE_LIBRARY})
 	TARGET_LINK_LIBRARIES(${PROJECT_NAME} PUBLIC Qt4::QtGui Qt4::QtCore)
-	TARGET_INCLUDE_DIRECTORIES(rom-properties-kde4 PUBLIC ${KDE4_INCLUDE_DIR} ${KDE4_INCLUDE_DIR}/KDE)
+	TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PUBLIC ${KDE4_INCLUDE_DIR} ${KDE4_INCLUDE_DIR}/KDE)
 	IF(HAVE_QtDBus)
-		TARGET_LINK_LIBRARIES(rom-properties-kde4 PUBLIC Qt4::QtDBus)
+		TARGET_LINK_LIBRARIES(${PROJECT_NAME} PUBLIC Qt4::QtDBus)
 	ENDIF(HAVE_QtDBus)
 
+	# PugiXML headers are needed for AboutTab.
+	TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PRIVATE ${pugixml_INCLUDE_DIR})
+
 	# libfmt
 	IF(Fmt_FOUND)
 		TARGET_LINK_LIBRARIES(${PROJECT_NAME} PRIVATE ${Fmt_LIBRARY})
diff --git a/src/kde/kf5/CMakeLists.txt b/src/kde/kf5/CMakeLists.txt
index abd1401d1..56504abff 100644
--- a/src/kde/kf5/CMakeLists.txt
+++ b/src/kde/kf5/CMakeLists.txt
@@ -127,6 +127,9 @@ IF(BUILD_KF5)
 		TARGET_LINK_LIBRARIES(${PROJECT_NAME} PUBLIC Qt5::DBus)
 	ENDIF(HAVE_QtDBus)
 
+	# PugiXML headers are needed for AboutTab.
+	TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PRIVATE ${pugixml_INCLUDE_DIR})
+
 	# libfmt
 	IF(Fmt_FOUND)
 		TARGET_LINK_LIBRARIES(${PROJECT_NAME} PRIVATE ${Fmt_LIBRARY})
diff --git a/src/kde/kf6/CMakeLists.txt b/src/kde/kf6/CMakeLists.txt
index dd42f7d8b..3bfbd5d22 100644
--- a/src/kde/kf6/CMakeLists.txt
+++ b/src/kde/kf6/CMakeLists.txt
@@ -114,6 +114,9 @@ IF(BUILD_KF6)
 		TARGET_LINK_LIBRARIES(${PROJECT_NAME} PUBLIC Qt6::DBus)
 	ENDIF(HAVE_QtDBus)
 
+	# PugiXML headers are needed for AboutTab.
+	TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PRIVATE ${pugixml_INCLUDE_DIR})
+
 	# libfmt
 	IF(Fmt_FOUND)
 		TARGET_LINK_LIBRARIES(${PROJECT_NAME} PRIVATE ${Fmt_LIBRARY})
diff --git a/src/win32/CMakeLists.txt b/src/win32/CMakeLists.txt
index 8a24abd12..8923d00e4 100644
--- a/src/win32/CMakeLists.txt
+++ b/src/win32/CMakeLists.txt
@@ -274,8 +274,8 @@ TARGET_LINK_LIBRARIES(${PROJECT_NAME} PRIVATE ${ZLIB_LIBRARIES})
 TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PRIVATE ${ZLIB_INCLUDE_DIRS})
 TARGET_COMPILE_DEFINITIONS(${PROJECT_NAME} PRIVATE ${ZLIB_DEFINITIONS})
 
-# TinyXML2 headers are needed for AboutTab.
-TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PUBLIC ${TinyXML2_INCLUDE_DIR})
+# PugiXML headers are needed for AboutTab.
+TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PRIVATE ${pugixml_INCLUDE_DIR})
 
 IF(Fmt_FOUND)
 	TARGET_LINK_LIBRARIES(${PROJECT_NAME} PRIVATE ${Fmt_LIBRARY})
diff --git a/src/win32/config/AboutTab.cpp b/src/win32/config/AboutTab.cpp
index 4ec859aac..072908ff7 100644
--- a/src/win32/config/AboutTab.cpp
+++ b/src/win32/config/AboutTab.cpp
@@ -70,7 +70,7 @@ using std::unique_ptr;
 #include "librpbase/img/RpPng.hpp"
 // TODO: JPEG
 #ifdef ENABLE_XML
-#  include "tinyxml2.h"
+#  include <pugixml.hpp>
 #endif
 
 // Useful RTF strings.
@@ -1186,20 +1186,34 @@ void AboutTabPrivate::initLibrariesTab(void)
 	sLibraries += fmt::format(FRUN(sLicense), "libpng license");
 #endif /* HAVE_PNG */
 
-	/** TinyXML2 **/
+	/** PugiXML **/
 #ifdef ENABLE_XML
-	const string tinyXml2Version = fmt::format(FSTR("TinyXML2 {:d}.{:d}.{:d}"),
-		static_cast<unsigned int>(TIXML2_MAJOR_VERSION),
-		static_cast<unsigned int>(TIXML2_MINOR_VERSION),
-		static_cast<unsigned int>(TIXML2_PATCH_VERSION));
+	// PugiXML 1.10 and later uses this format: 1140 == 1.14.0
+	// PugiXML 1.9 and earlier uses this format: 190 == 1.9.0
+	unsigned int pugixml_major, pugixml_minor, pugixml_patch;
+	if (PUGIXML_VERSION >= 1000) {
+		pugixml_major = PUGIXML_VERSION / 1000;
+		pugixml_minor = (PUGIXML_VERSION % 1000) / 10;
+		pugixml_patch = PUGIXML_VERSION  % 10;
+	} else {
+		pugixml_major = PUGIXML_VERSION / 100;
+		pugixml_minor = (PUGIXML_VERSION % 100) / 10;
+		pugixml_patch = PUGIXML_VERSION % 10;
+	}
+
+	string pugiXmlVersion = fmt::format(FSTR("PugiXML {:d}.{:d}"),
+		pugixml_major, pugixml_minor);
+	if (pugixml_patch > 0) {
+		pugiXmlVersion += fmt::format(FSTR(".{:d}"), pugixml_patch);
+	}
 
 	// FIXME: Runtime version?
 	sLibraries += RTF_BR RTF_BR;
 	sLibraries += fmt::format(FRUN(sCompiledWith), tinyXml2Version);
 	sLibraries += RTF_BR
-		"Copyright (C) 2000-2021 Lee Thomason" RTF_BR
-		"http://www.grinninglizard.com/" RTF_BR;
-	sLibraries += fmt::format(FRUN(sLicense), "zlib license");
+		"Copyright (C) 2006-2025, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)" RTF_BR
+		"https://pugixml.org/" RTF_BR;
+	sLibraries += fmt::format(FRUN(sLicense), "MIT license");
 #endif /* ENABLE_XML */
 
 	/** GNU gettext **/