Hello!
I'm now studying Game Editor tutorials and the Moon Defender example. When I made score counter, I accidentally use 'GameFont1.bmp' instead than 'numbers.png' so the actor became totally invisible. And problem is that because it is invisible I cannot change its animation or even destroy it. I know that actor is still exist because GE will bring error message if I try to make actor with same name.
I also created test actor 'Harjoitus' and made it totally invisible by setting its transparency full. And the result is: actor lost. So does GE have any possibility to alter invisible actors? If not, that would be nice feature in next update (for example, add an option to main menu which brings a list of all actors that are used in game and there developer could remove those whom are out of reach).