Yes the eshop plugin was working besides Events Calendars Pro 2.7. I installed the new version of WordPress and then updated my plugins. I deactivated all plugins except for eshop and then successively activated each plugin checking to see if the eShop search still worked. When I activated Event Calendar 3.0, the product search stopped working.
Here is a link to the eShop plugins. http://wordpress.org/plugins/eshop/
I have restored the 2.7 versions of Events Calendar and Events Calendar PRO and the eShop search is working, so I have a workaround for the time being.
Thanks for your help! I know its a tough issue when it’s a conflict between two plugins.
Ken