Little V4 Problem
 

Hello, I'm having a little problem with V4..When it's going in the update mode. It updates then it says Graal V4 Problem: Graal V4 Could not be deleted. And everytime I start It goes back to the update screen and does it over again. So I had to download it again and now it works fine. . . .
Untill the next update x_x ..Any suggestions?

Also this may be a little offtopic, in a way but what are all the serverops for the Graal Versions to turn them off so ONLY GraalV4 is enabled on your server?