Qt IFW silentUpdate fails in Windows when the application is running

t IFW silentUpdate fails in Windows 7 when the application is already running with the error

{{Unable to update components. Please stop these processes.. }}

Updating from GUI of the maintenancetool will be successful even when the application is running.

Apparently the silentUpdate mode misses something that the GUI mode has.

 
IFW Version Info
{{IFW Version: 3.0.1, built with Qt 5.9.0. Build date: Sep 14 2017 Installer Framework SHA1: a1f5686 }}
The problem is reproducible in every way possible.

I have uploaded the sample which can be downloaded from https://files.fm/u/wqrrppkk

Steps to reproduce the bug

• Create an online only installer
• Create the repository (of packages) accessible from localhost
• Install
• Run the installed app.exe and leave it running. The titlebar will display "Version 1"
• Create the repository (of packages_update) accessible from localhost
• When app.exe is running, run maintainancetool -v --silentUpdate

Result
{{Unable to update components. Please stop these processes.. <path>/app.exe }}
Proper Working from the GUI mode

• Do all the above steps except running the maintainancetool -v --silentUpdate
• Instead run the maintainancetool.exe manually by double clicking from the Explorer
• Install the updates when app.exe is already running.

Result
The update is successful even when app.exe is running without affecting it ( like in linux). Newer instances of app.exe will run the newly installed update showing "Version 2" in the title-bar. This is the intended result.

Somehow the "maintainancetool -v --silentUpdate" fails to deliver what the GUI mode delivers.