Description of the Issue

Each time you open it, a dialog will pop up asking if you want to open a bunch of files.

Steps to Reproduce the Issue

1. NPP portable version 7.8, extract to D:\Program Files\notepad++
2. open notepad++.exe
3. After click "No"，NPP will ask you create a .txt file in exacted path

1. NPP portable version 7.8, extract to D:\Program Files\notepad++
2. Follow the manual https://npp-user-manual.org/docs/other-resources/, set NPP replace original Windows Notepad.exe
3. double click open a .txt suffix file

Update:
If I don't modify the registry, it won't appear this issue. (NPP portable v7.8)
Only replaced original notepad by modifying the registry will appear this issue.
After I changed the path to D:\notepad++(path without whitespace) and registered again, it still appear the issue.

Expected Behavior

Don't pop up the dialog.

Actual Behavior

A dialog pop up asking if you want to open a bunch of files.

Debug Information

Notepad++ v7.8 (64-bit)
Build time : Oct 7 2019 - 00:55:55
Path : D:\Program Files\notepad++\notepad++.exe
Admin mode : OFF
Local Conf mode : ON
OS Name : Windows 10 Enterprise LTSC 2019 (64-bit)
OS Version : 1809
OS Build : 17763.316
Plugins : AutoCodepage.dll mimeTools.dll NppConverter.dll NppExport.dll NppSaveAsAdmin.dll

NPP v7.7.1 doesn't have this issue, but NPP v7.8 has this issue.