Each time I try to update from 4.15.1000 to the most recent version 4.26.1000 (which I am prompted to do by a pop-up box telling me there is a newer version), I get an error message "you must stop the scan and close the superantispyware main screen before updating". I am not running a scan and if I close the main window the pop up box with update link goes away. ??? Any helpful ideas? Thank you very much.