LabVIEW
How to delete “All files” from Path browse Option？
Solved!
There's no easy way to get rid of that.
It looks like Windows adds it by default, and removing it isn't easy (not just in LabVIEW).
It has been asked before:
Re: File Dialog - How can I remove/Disable "All files(*.*)" option. - NI Community
It's learn to live with it 😑, unless you're looking for a chalange.
Search LabVIEW like a graph! 
@billko wrote:
I'm guessing it's part of the Windows API, as all file dialogs I know of have this.
Indeed.
Changing this might not be what the user wants, as it's standard to have this.
Also, removing *.* as pattern doesn't prohibit the user from opening any file. The files are not listed, but the user can still type any file name, and Windows will give a list of files with other extension and allow you to open it.
