taskbar planned on 2 or more lines

Hi, I have installed the version 3.13.121240.574 and I have XP for SP2.
I have the habit to hold the taskbar applications of XP planned on 2 or more lines to have the whole disposition icons and the clean desktop.
I am sure that to every reboot, Comodo set to an alone line. Do you suggest me which formulations or keys of register I must change for avoiding this drawback?