diff --git a/NEWS.md b/NEWS.md
index a0b0c2f..268c3db 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,10 +1,17 @@
 Changelog
 =========
 
+Version 1.0.0 - May 24, 2024
+-----------------------------
+Enhancement: Migrated to Qt6, which is now the default build option           
+Enhancement: Updated Scintilla to 5.5.0          
+Qt5 and NO_GUI remain additional build options           
+Qt4 and 32-bit Windows support removed
+
 Version 0.27.0 - Jan 25, 2024
 -----------------------------
-Enhancement: Compressed cscope.out (built without -c) supported experimentally.          
-Enhancement: CodeQuery database file can be opened by CodeQuery GUI through command line argument.
+Enhancement: Compressed cscope.out (built without -c) supported experimentally          
+Enhancement: CodeQuery database file can be opened by CodeQuery GUI through command line argument
 
 Version 0.26.0 - Dec 19, 2022
 -----------------------------
diff --git a/README.md b/README.md
index 56e576e..7acf883 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ The CodeQuery database file can be viewed and queried using the *codequery* GUI
 [![Build Status](https://github.com/ruben2020/codequery/actions/workflows/cmake.yml/badge.svg?branch=master)](https://github.com/ruben2020/codequery/actions)        [![Coverity Status](https://scan.coverity.com/projects/10066/badge.svg)](https://scan.coverity.com/projects/ruben2020-codequery)
       
 
-## Latest version = 0.27.0
+## Latest version = 1.0.0
 
 Windows binaries available here for download: [CodeQuery@sourceforge downloads](https://sourceforge.net/projects/codequery/files/)
 
@@ -115,7 +115,7 @@ Yes. However, donations are welcomed.
 
 ## Which platforms are supported?
 
-It has been tested on Windows 10 64-bit, Windows XP 32-bit (until version 0.27.0 only), Mac OS X, Ubuntu and Arch Linux 64-bit.
+It has been tested on Windows 10 64-bit, Mac OS X, Ubuntu and Arch Linux 64-bit.
 
 Contributions are welcomed to attempt ports to other operating systems.
 
diff --git a/makedb/swver.h b/makedb/swver.h
index 0632206..1f447f4 100644
--- a/makedb/swver.h
+++ b/makedb/swver.h
@@ -13,7 +13,7 @@
 #ifndef SWVER_H_CQ
 #define SWVER_H_CQ
 
-#define CODEQUERY_SW_VERSION      "CodeQuery 0.27.0"
+#define CODEQUERY_SW_VERSION      "CodeQuery 1.0.0"
 #define CODEQUERY_SW_VERSION_WEBSITE      "<p>"\
 	CODEQUERY_SW_VERSION \
 	"</p>"\
diff --git a/release.json b/release.json
index 15f25d0..180bc92 100644
--- a/release.json
+++ b/release.json
@@ -1,8 +1,8 @@
 {
-    "version": "0.27.0",
+    "version": "1.0.0",
     "state": "stable",
     "scope": "minor feature",
-    "changes": "compressed cscope.out supported experimentally and command line opening of db by GUI",
+    "changes": "Migrated to Qt6",
     "download": "https://sourceforge.net/projects/codequery/files/"
 }
 
diff --git a/windows-install/qt5/codequeryqt5.wxs b/windows-install/qt5/codequeryqt5.wxs
index d90f611..5dcc877 100644
--- a/windows-install/qt5/codequeryqt5.wxs
+++ b/windows-install/qt5/codequeryqt5.wxs
@@ -1,10 +1,10 @@
 <?xml version='1.0' encoding='windows-1252'?>
 <Wix xmlns='http://schemas.microsoft.com/wix/2006/wi'>
-    <Product Name='CodeQuery 0.27.0 (Qt5, 64-bit)' Manufacturer='ruben2020_foss'
+    <Product Name='CodeQuery 1.0.0 (Qt5, 64-bit)' Manufacturer='ruben2020_foss'
         Id='*' 
         UpgradeCode='2368ce2d-f635-4c8c-9b92-6fa348b292af'
-        Language='1033' Codepage='1252' Version='0.27.0'>
-		<Package Id='*' Keywords='Installer' Description="CodeQuery 0.27.0 (Qt5, 64-bit) Installer"
+        Language='1033' Codepage='1252' Version='1.0.0'>
+		<Package Id='*' Keywords='Installer' Description="CodeQuery 1.0.0 (Qt5, 64-bit) Installer"
 			Comments='Copyright 2013-2024 (C) ruben2020' Manufacturer='ruben2020_foss'
 			InstallerVersion='200' Languages='1033' Compressed='yes' SummaryCodepage='1252'
 			Platform="x64" />
@@ -37,7 +37,7 @@
 		<Directory Id='TARGETDIR' Name='SourceDir'>
 			<Directory Id='ProgramFilesFolder' Name='PFiles'>
 				<Directory Id='CodeQuery' Name='CodeQuery'>
-					<Directory Id='INSTALLDIR' Name='CodeQuery 0.27.0 64bit'>
+					<Directory Id='INSTALLDIR' Name='CodeQuery 1.0.0 64bit'>
 						<Component Id='CodeQueryGUI_64bit' Guid='2989278c-93cd-4ef7-a692-4eef77e747fb'>
 							<File Id='codequeryEXE' Name='codequery.exe' DiskId='1' Source='codequery.exe' KeyPath='yes'>
 								<Shortcut Id="startmenuCodeQueryShortcut" Directory="AppProgramMenuFolder" Name="CodeQuery"
@@ -162,7 +162,7 @@
 				</Directory>
 			</Directory>
 			<Directory Id="ProgramMenuFolder" Name="Programs">
-				<Directory Id="AppProgramMenuFolder" Name="CodeQuery 0.27.0 (64-bit)" />
+				<Directory Id="AppProgramMenuFolder" Name="CodeQuery 1.0.0 (64-bit)" />
 			</Directory>
 		</Directory>
 		<DirectoryRef Id="AppProgramMenuFolder">
@@ -171,7 +171,7 @@
 				<RegistryValue Root='HKCU' Key='Software\[Manufacturer]\[ProductName]' Type='string' Value='' KeyPath='yes' />
 			</Component>
 		</DirectoryRef>
-		<Feature Id='Complete' Title='CodeQuery 0.27.0 (Qt5, 64-bit)' Description='The complete package.' Level='1' ConfigurableDirectory='INSTALLDIR' InstallDefault='local' Absent='disallow'>
+		<Feature Id='Complete' Title='CodeQuery 1.0.0 (Qt5, 64-bit)' Description='The complete package.' Level='1' ConfigurableDirectory='INSTALLDIR' InstallDefault='local' Absent='disallow'>
 			<ComponentRef Id='CodeQueryGUI_64bit' />
 			<ComponentRef Id='cqmakedb_64bit' />
 			<ComponentRef Id='cqsearch_64bit' />
diff --git a/windows-install/qt6/codequeryqt661.wxs b/windows-install/qt6/codequeryqt661.wxs
index 47d5821..d6c4ffc 100644
--- a/windows-install/qt6/codequeryqt661.wxs
+++ b/windows-install/qt6/codequeryqt661.wxs
@@ -1,10 +1,10 @@
 <?xml version='1.0' encoding='windows-1252'?>
 <Wix xmlns='http://schemas.microsoft.com/wix/2006/wi'>
-    <Product Name='CodeQuery 0.27.0 (Qt6, 64-bit)' Manufacturer='ruben2020_foss'
+    <Product Name='CodeQuery 1.0.0 (Qt6, 64-bit)' Manufacturer='ruben2020_foss'
         Id='*' 
         UpgradeCode='2368ce2d-f635-4c8c-9b92-6fa348b292af'
-        Language='1033' Codepage='1252' Version='0.27.0'>
-		<Package Id='*' Keywords='Installer' Description="CodeQuery 0.27.0 (Qt6, 64-bit) Installer"
+        Language='1033' Codepage='1252' Version='1.0.0'>
+		<Package Id='*' Keywords='Installer' Description="CodeQuery 1.0.0 (Qt6, 64-bit) Installer"
 			Comments='Copyright 2013-2024 (C) ruben2020' Manufacturer='ruben2020_foss'
 			InstallerVersion='200' Languages='1033' Compressed='yes' SummaryCodepage='1252'
 			Platform="x64" />
@@ -37,7 +37,7 @@
 		<Directory Id='TARGETDIR' Name='SourceDir'>
 			<Directory Id='ProgramFilesFolder' Name='PFiles'>
 				<Directory Id='CodeQuery' Name='CodeQuery'>
-					<Directory Id='INSTALLDIR' Name='CodeQuery 0.27.0 64bit'>
+					<Directory Id='INSTALLDIR' Name='CodeQuery 1.0.0 64bit'>
 						<Component Id='CodeQueryGUI_64bit' Guid='dbac3c37-625f-46ac-9050-b470361351e7'>
 							<File Id='codequeryEXE' Name='codequery.exe' DiskId='1' Source='codequery.exe' KeyPath='yes'>
 								<Shortcut Id="startmenuCodeQueryShortcut" Directory="AppProgramMenuFolder" Name="CodeQuery"
@@ -173,7 +173,7 @@
 				</Directory>
 			</Directory>
 			<Directory Id="ProgramMenuFolder" Name="Programs">
-				<Directory Id="AppProgramMenuFolder" Name="CodeQuery 0.27.0 (64-bit)" />
+				<Directory Id="AppProgramMenuFolder" Name="CodeQuery 1.0.0 (64-bit)" />
 			</Directory>
 		</Directory>
 		<DirectoryRef Id="AppProgramMenuFolder">
@@ -182,7 +182,7 @@
 				<RegistryValue Root='HKCU' Key='Software\[Manufacturer]\[ProductName]' Type='string' Value='' KeyPath='yes' />
 			</Component>
 		</DirectoryRef>
-		<Feature Id='Complete' Title='CodeQuery 0.27.0 (Qt6, 64-bit)' Description='The complete package.' Level='1' ConfigurableDirectory='INSTALLDIR' InstallDefault='local' Absent='disallow'>
+		<Feature Id='Complete' Title='CodeQuery 1.0.0 (Qt6, 64-bit)' Description='The complete package.' Level='1' ConfigurableDirectory='INSTALLDIR' InstallDefault='local' Absent='disallow'>
 			<ComponentRef Id='CodeQueryGUI_64bit' />
 			<ComponentRef Id='cqmakedb_64bit' />
 			<ComponentRef Id='cqsearch_64bit' />
diff --git a/windows-install/qt6/codequeryqt671.wxs b/windows-install/qt6/codequeryqt671.wxs
index 8f7ef82..043116b 100644
--- a/windows-install/qt6/codequeryqt671.wxs
+++ b/windows-install/qt6/codequeryqt671.wxs
@@ -1,10 +1,10 @@
 <?xml version='1.0' encoding='windows-1252'?>
 <Wix xmlns='http://schemas.microsoft.com/wix/2006/wi'>
-    <Product Name='CodeQuery 0.27.0 (Qt6, 64-bit)' Manufacturer='ruben2020_foss'
+    <Product Name='CodeQuery 1.0.0 (Qt6, 64-bit)' Manufacturer='ruben2020_foss'
         Id='*' 
         UpgradeCode='2368ce2d-f635-4c8c-9b92-6fa348b292af'
-        Language='1033' Codepage='1252' Version='0.27.0'>
-		<Package Id='*' Keywords='Installer' Description="CodeQuery 0.27.0 (Qt6, 64-bit) Installer"
+        Language='1033' Codepage='1252' Version='1.0.0'>
+		<Package Id='*' Keywords='Installer' Description="CodeQuery 1.0.0 (Qt6, 64-bit) Installer"
 			Comments='Copyright 2013-2024 (C) ruben2020' Manufacturer='ruben2020_foss'
 			InstallerVersion='200' Languages='1033' Compressed='yes' SummaryCodepage='1252'
 			Platform="x64" />
@@ -37,7 +37,7 @@
 		<Directory Id='TARGETDIR' Name='SourceDir'>
 			<Directory Id='ProgramFilesFolder' Name='PFiles'>
 				<Directory Id='CodeQuery' Name='CodeQuery'>
-					<Directory Id='INSTALLDIR' Name='CodeQuery 0.27.0 64bit'>
+					<Directory Id='INSTALLDIR' Name='CodeQuery 1.0.0 64bit'>
 						<Component Id='CodeQueryGUI_64bit' Guid='dbac3c37-625f-46ac-9050-b470361351e7'>
 							<File Id='codequeryEXE' Name='codequery.exe' DiskId='1' Source='codequery.exe' KeyPath='yes'>
 								<Shortcut Id="startmenuCodeQueryShortcut" Directory="AppProgramMenuFolder" Name="CodeQuery"
@@ -173,7 +173,7 @@
 				</Directory>
 			</Directory>
 			<Directory Id="ProgramMenuFolder" Name="Programs">
-				<Directory Id="AppProgramMenuFolder" Name="CodeQuery 0.27.0 (64-bit)" />
+				<Directory Id="AppProgramMenuFolder" Name="CodeQuery 1.0.0 (64-bit)" />
 			</Directory>
 		</Directory>
 		<DirectoryRef Id="AppProgramMenuFolder">
@@ -182,7 +182,7 @@
 				<RegistryValue Root='HKCU' Key='Software\[Manufacturer]\[ProductName]' Type='string' Value='' KeyPath='yes' />
 			</Component>
 		</DirectoryRef>
-		<Feature Id='Complete' Title='CodeQuery 0.27.0 (Qt6, 64-bit)' Description='The complete package.' Level='1' ConfigurableDirectory='INSTALLDIR' InstallDefault='local' Absent='disallow'>
+		<Feature Id='Complete' Title='CodeQuery 1.0.0 (Qt6, 64-bit)' Description='The complete package.' Level='1' ConfigurableDirectory='INSTALLDIR' InstallDefault='local' Absent='disallow'>
 			<ComponentRef Id='CodeQueryGUI_64bit' />
 			<ComponentRef Id='cqmakedb_64bit' />
 			<ComponentRef Id='cqsearch_64bit' />