• The name of the app in the title bar of the window is MiTeC XML Viewer
• The name of the app in the "About" window is XML Viewer
• The files you download are a zipped EXE (so there is no installation needed)
• The app is available in 32 Bit and also in 64 Bit (I have the32 Bit)

Here the information extracted from the EXE file:

File name and path:     D:\PortableApps\PortableApps\_WSCCPortable\MiTeC Utilities\XMLView.exe
Product Name:           XML Viewer
Internal Name:          
Original Filename:      

File Description:       Full featured fast XML Viewer supporting large files
Company:                MiTeC
Legal Copyright:        Copyright (c) 2014-2020, Michal Mutl
Legal Trademarks:       All rights reserved
Comments:               

File Version String:    6.0.0.0
File Version:           6.0.0.0
Product Version String: 6.0.0.0
Product Version:        6.0.0.0