Hi,
I downloaded demo from url https://github.com/ElectronNET/electron.net-api-demos/tree/v5.22.12 where should be probbably used nuget package in version 5.22.12 and I edited electron.manifest.json file

After build (electronize build /target win) application is not opened . If you change "singleInstance" to false application is opened.
Thanks