New CP window on Mac OS Mojave

Hi there,

I was wondering if anyone could help me with the following. I have installed separately, CP 3.0.0, 3.1.5 and 3.1.8 and in all of them I cannot open a new CP window. I don’t get any error message and the program itself doesn’t crash.
These are the java JDK and JSE respectively (as far as I knowledge goes of java ).
javac 1.8.0_131
java version “1.8.0_131”
MAC OS Mojave 10.14.3.

Have you ever encountered this problem before? and is any way to fix it?

Many thanks,

Best wishes,