Attached Link: http://66.39.71.195/Fractals/

Under the menu of OPTIONS, you should be able to change the SIZE of each image's resolution to whatever you choose. And under the same menu, the PREFERENCES has a popup window to allow many specific settings to be made. Under the tab for 'Spots and Images', if the Antialiasing is checked to be ON as the default, then the saved image size will be half of whatever you set when rendering at a particular resolution. I use the default setting for an anitaliasing option. :-) Good luck on learning the use of Fractal Explorer.