Second Application opening QSystemTray

[Spitfire]

QProcess p(this);
p.start("Path/to/your/app/app.exe");

QProcess p(this);
p.start("Path/to/your/app/app.exe");

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If main() in your app looks like the one few posts up (if app is running it shows it and bails out) then every attempt to launch the app while it's running will cause it to be shown.