How do you save an effect preset that you have changed, when you don't know which preset is running?
Sometimes I have to guess and hope that I don't overwrite the wrong preset.
There should be a "save" button to overwrite the current preset, and a "save as" button in order to choose a new name or choose an existing preset to overwrite. I admit I didn't invent this concept, it is quite common...
Alternatively the current preset should be marked in the save window, maybe with a *.