Activate running application

I have a button that runs MS Edge.
I might minimize Edge on my third screen.

If I press the Edge button in Directory Opus, I don't want another instance of Edge to start (on screen 1). I just want the current one to be activated.

Is this possible?

That's up to Edge more than Opus. If it doesn't work that way by default, it may have command-line arguments to tell it to work differently, or there may be other ways to do it than running it directly. (For example, launching a URL would usually reuse the existing browser window, if it's the default browser.)

If Edge has a method for telling it to do what you want it to do, Opus can probably trigger it, but the actual method will depend on Edge.