In order for the ProShow Plug-in for Lightroom to work properly you must make sure the plug-in knows where ProShow is installed on your computer.  To set the installation path for ProShow in the plug-in, scroll down to the bottom of the export plug-in dialog and locate the section labeled ‘ProShow Configuration’ and click the ‘Browse’ button.

When using the ProShow Plug-in for Lightroom, the option to export to ProShow is located under the File > Export menu.  If the ProShow option isn’t there, you’ll need to verify that you’ve got the right version of Lightroom and the plug-in installed.