Select all the duplicate entries from the Start ... C:\ProgramData\Microsoft\Windows\Start Menu\Programs. From here, you will find the duplicate icons. Then, you can delete one of the icons ...

but not all, of the applications in the Start menu. Since a one-for-one correlation did not exist, the Open function only confused people, and it was abandoned in Windows 7. See Program Files.

If you are using Windows 11/10 and you want to rename Start Menu apps, here is what you need to do. Programs get added in Start Menu automatically after installation with the default name.

Microsoft is working on a Start Menu redesign for Windows again, but this time I think they're onto something.