Refuse to open multiple game instances (.exe)

[Quetzalcodename]

Hey @MaybeAnge!

For a simple solution, check out this plugin from the Unreal Engine Marketplace:

CheckAppInstance

Otherwise, check out the source code the same user shared in this thread:

Avoid multiple instances of an application

Hi. Maybe for somebody still actual. Check my plugin: https://www.unrealengine.com/marketplace/en-US/product/checkappinstance https://github.com/mrbindraw/CheckAppInstance Enjoy!

Let me know if this works for you!