I just checked 2020 in PSPro and it saves the column widths after you change them, I just dragged and dropped the vertical line separating the columns where I wanted it  (I hadnt checked when I commented previously).  I made a few wider, then exited the program, when I restarted the program and signed back in, those columns were still set to the width I had changed.

The EFCenter HB has never been customizable, but I sure wish it was!