The lister fixes and needs to be minimalized to switch applications

Recently we (my private license and the work licencse on various machines) are running into this problem where the Dopus lister fixes and changing applications with the taskbar, CTRL-tab etc does not work, only minimizing or closing the lister seems to be the main option. I have not been able to find a setting for this and the only solution to date is re-installing DOPUS.

Please advise if this can be changed?