I have two PC in my room, my media pc and my main pc, which I use for testing addons, new builds, stuff I don't want to muck up my media pc since I've spent a lot of time configuring it and as such, I've had IPstalker installed on both, but as soon as I say start my main pc to test something, my media pc will flash up that ipstalker authorization failed until I close the main pc, then my media pc will connect so I know two accounts don't work at once.