Please do NOT republish copyrighted extensions. This often results in old versions hanging around that people install rather than getting the latest version from the Extension Warehouse or the SketchUcation Plugin Store.
Sometimes when updating or when displays have been unplugged from the last time an extension was used, the dialog coordinates could be offscreen. You can try my dialog cascader extension to bring it back onscreen:
[Extension] Dialog Cascader for Ruby extension dialogs - Extensions - SketchUp Community