You should never move a program. Uninstall, then
reinstall.
it does not appear in the Open with list, even when I browse to
the program in its new location by clicking on "choose program"
That sounds like the window for opening unregistered file
types. Isn't .avi registered? (It should have some kind of
icon other than the generic-EXE-with red/blue/green-dots
icon.)
The EXE needs to be registered if it's to appear as
an option for opening with. If you moved it then it's not
registered. Or rather, it's registered but the EXE file is
considered missing. To fix that, go here:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\
Look for a key named like VideoEdit.exe, check the default
value, and make sure it matches the current path.
Another option that's handy for often-used programs is
to just add their own Open With menu.
Go to HKCR\*\shell
Add a new subkey named anything.
(They appear in alphabetical order on the menu.)
The default value there will show on the menu.
Under that, add a subkey named "command".
The default value there should be the exe path
followed by a space and then "%1" (with the quotes).
Like so:
HKCR\*\shell\Notepad\
default value: "Open with Notepad"
HKCR\*\shell\Notepad\command\
default value:
"C:\WINDOWS\System32\NOTEPAD.EXE" "%1"
HKCR\*\shell\Z7zip\
default value: "Open with 7-Zip"
HKCR\*\shell\Z7zip\command\
default value:
"C:\Program Files\7-Zip\7zFM.exe" "%1"
I currently have 6 of those on my context menu.
Very handy. I can run an HTML file or right-click
to open in my HTML editor. I can open anything in
Notepad to view it as plain text. I can run a ZIP
file in my default ZIP handler, or right-click to open
it in 7-Zip instead. I can double-click a GIF to
view it in IrfanView, or right-click and open it in
Paint Shop Pro.....etc.
Notice I named the 7-Zip key
"Z7zip". The name of that key doesn't matter.
I just use the Z to make it show after
"Open with Notepad" on the context menu.