New Post: greenshot upgrade

I am having an issue getting this to work for me.

Looks like I can get the taskkill to work but then my update fails after that.

It runs OK from a batch file in the following format.

@echo off

echo Checking file existence on %computername%

if exist "C:\Program Files\Greenshot\unins000.exe" (
 echo File exist on %computername%


 echo Stopping greenshot.exe on computer %%i
 c:\Windows\System32\taskkill.exe /F /IM greenshot.exe /T

Pause

 echo Installing Greenshot on %computername%

\shared\files\Techdownload\Greenshot\Greenshot-INSTALLER-1.2.8.12-RELEASE.exe /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-

) else (
    echo File does NOT exist on %computername%

)

)
Pause

In WPP I did custom update. I added two different "Allow to execute a file".

One with what Bill_T had above which kills the running exe of greenshot:
<ElementType>CustomUpdateElements.ExecutableElement</ElementType>
<PathToExecutable>c:\Windows\System32\taskkill.exe</PathToExecutable>
<Parameters>/F /IM greenshot.exe /T</Parameters>


The other to install the program:
<ElementType>CustomUpdateElements.ExecutableElement</ElementType>
<PathToExecutable>C:\PackageContent\Greenshot\Greenshot-INSTALLER-1.2.8.12-RELEASE.exe</PathToExecutable>
<Parameters>/VERYSILENT /SUPPRESSMSGBOXES /NORESTART</Parameters>
<KillProcess>True</KillProcess>
<TimeBeforeKilling>10</TimeBeforeKilling>

In the " if the update is already installed." I have it look for a registry key to see if current version already exists.
<bar:RegSz Key="HKEY_LOCAL_MACHINE" Subkey="SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Greenshot_is1" Value="DisplayVersion" Comparison="EqualTo" Data="1.2.8.12"/>

In the "Allow clients computer to determine if the update is installable."

I have it make sure the machine is running windows 7 or Windows 8.1.

What am I missing?