In order to fix the issue, I suggest you uninstall the program using its uninstaller or Add or Remove Programs feature (Control Panel > Uninstall a program) and after that download and install the full version of the application from the official web page. Click the Drivers & Software tab, select your operating system if it is not automatically detected and expand the Software list. Select ZoomBrowser EX 6.6.0b Application, check the provided box and download and install the software.