1. Fix vulnerability (CVE-2026-46710) of v8.9.4 & v8.9.5 installer.
2. Fix x86 installer regression of not showing installation entry in “Unstall a program” of Control Panel.
3. Fix x86 installer regression where context menu not installed or uninstalled correctly.
4. Fix UAC prompt display regression (“Notepad++ installer” instead of “Notepad++”) for Notepad++ v8.9.5.
5. Fix incorrect bevaviour when saving dirty read-only files.
6. Fix regression where saving a UDL file removed XML declaration.
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