Created attachment 174339 [details] Qalculate settings I have a keyboard shortcut for KCalc. Now every pressing the shortcut opens a new instance of KCalc it leads to multiple KCalcs open. I'd like to have an option "Allow multiple instances". It can be the default option for only one instance at a time. For example running KCalc again could bring it window to the front. Qalculate (https://flathub.org/apps/io.github.Qalculate) has by default one instance, but you can enable multiple instances in settings, see screenshot.