Description of the Issue

I usually keep a text file open in Notepad++ with special characters that I use to paste into documents. Because I don't want to inadvertently change it, I have the read-only flag set, just in case. However, with the latest update to Notepad++, the read-only flag is cleared when I open Notepad++.

I tried setting the file's read-only attribute in Windows Explorer, while Notepad++ was closed. Then, after reopening Notepad++, the flag was still set. However, after clearing it and setting it again in Notepad++, the wrong behavior continued.

Steps to Reproduce the Issue

1. Set the read-only flag on a file
2. Close Notepad++
3. Open Notepad++

Expected Behavior

The read-only flag should remain set or cleared for each file, whatever its state was when last open.

Actual Behavior

The read-only flag is cleared for a file that was previously set.

Debug Information

Notepad++ v7.5.6 (32-bit)
Build time : Mar 19 2018 - 00:26:59
Path : C:\Program Files (x86)\Notepad++\notepad++.exe
Admin mode : OFF
Local Conf mode : OFF
OS : Windows 10 (64-bit)
Plugins : DSpellCheck.dll GedcomLexer.dll mimeTools.dll NppConverter.dll NppExport.dll PluginManager.dll