Test Execute | Cannot Launch another instance of this application

1) I installed test complete and test execute on my computer.

2) I created a sample project on a network location

3) I run the specific test routine via test executed --> All good till now.

When I try to run the same cmd line again, I am getting the following error. It is obvious I have to kill the test executor. 

But, there is another project that I am trying to add new tests and test executor is always running there, as I see.

 Isn't there any other way to run the tests through the executor without killing the existing app?

many thanks for your answer.