Last CCleaner v5.54.7088 window not resizing. in CCleaner Bug Reporting Posted April 27, 2019 I am having the same problem in version 5.56.7144. When I click on the top right icon to change to full screen to window mode, it switches to a window but does not allow to change the size. Currently the execute or cancel options do not show and cannot therefore be executed. Full screen has to be chosen to see the run option. Could you explain why you are doing this?.. I know you must have had a reason. Thanks a bunch for your good work!