@giorgosbamvakaskaratzas1: I encourage you to stop worrying and learn to love squad management, since keeping all your superstars happy is basically the only challenge you'll face playing as RM or Barcelona.

But if you insist, all you'd need to do is open up this file in the pregame editor, go to advanced rules, select the first entry in the list (above FIFA Club World Cup, it will have a blank name), then select Fixture Rules, then change whatever you want under there. Rules 0 is for the CL, Rules 1 is for the WL, Rules 2 is for the Youth League. Then save it under a different name and pick that file when you start a new game.

If you mean "how to remove the squad limits in the base game's Champions League", I'm sure there's a way but I don't precisely know how.

MY GOOD FRIEND,PLEASE FORGIVE MY ENGLISH CAUSE IT'NOT MY MOTHER LANGUAGE AS I AM FROM GREECE.I WAND TO ASK YOU SOMETHING.IS THERE ANY WAY TO AVOID THE 25 PLAYERS LIMITS IN CHAMPIONS LEAGUE AND IF YES TELL ME HOW TO DO IT BECAUSE I' M VERY NERVOUS ABOUT THIS.IF FOR EXAMPLE I MANAGE REL MADRIT OR BARCELONA THE MOST PLAYERS THEY DON'T PLAY IN THE CHAMPIONS LEAGUE HAVE SERIOUS COMPLAINS SO I TRY ONCE AGAIN TO FIND A WAY TO AVOID THIS VIA EDITOR.PLEASE TELL ME IF THERE IS A WAY

Huh. I didn't think to make one that didn't, it would be basically impossible to schedule if it DIDN'T replace them.

Thank you very much, do you have the mod version which not replace all club continental competitions and the Club World Cup?