How to remove programs from "Open With" dialogue?

[Some dumb guy]

When I attempt to open a file that does not have an extension, the "Open
With" dialog box presents me with a list of programs from which to
choose to open this extenionless file, or I may choose to click the
"Browse" button.

Unwanted programs appear on this list. One such program is:

"PerfVis NT Performance Tool"

also known as "Bootvis.exe"

I tried using Regedit to edit the branch:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts

However, this program was not to be found in any of the OpenWithList
folders of any of the file types listed there. In fact, no reference to
this file could be found in any part of this branch.

The only reference to "PerVis NT Performance Tool" in the registry was
to be found in a couple of Muicache folders. After backing up those
folders, I deleted every reference to "PerfVis NT Performance Tool" from
the registry and still the program appears in the "Open With" dialog
box. I restored the deleted references.

At this point, I would like to stress that this is *not* the right-click
context menu I am concerned with. I can edit that with no problem.

It is the "Open With" dialog box that appears when clicking on a file
with no extension or no known extension.

Thanks for any help.

 

[Some dumb guy]

When I attempt to open a file that does not have an extension, the "Open
With" dialog box presents me with a list of programs from which to
choose to open this extenionless file, or I may choose to click the
"Browse" button.

Unwanted programs appear on this list. One such program is:

"PerfVis NT Performance Tool"

also known as "Bootvis.exe"

I tried using Regedit to edit the branch:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts

However, this program was not to be found in any of the OpenWithList
folders of any of the file types listed there. In fact, no reference to
this file could be found in any part of this branch.

The only reference to "PerVis NT Performance Tool" in the registry was
to be found in a couple of Muicache folders. After backing up those
folders, I deleted every reference to "PerfVis NT Performance Tool" from
the registry and still the program appears in the "Open With" dialog
box. I restored the deleted references.

At this point, I would like to stress that this is *not* the right-click
context menu I am concerned with. I can edit that with no problem.

It is the "Open With" dialog box that appears when clicking on a file
with no extension or no known extension.

Thanks for any help.

Found my own answer:

OpenWithView
http://www.nirsoft.net/utils/open_with_view.html