I am unable to search using the software. It always reports an error.

Here are some checks you might want to do in case the software displays an error every time you do a search.

• Check if the Google license key was input correctly. It is always safer to copy it from the email and paste it into the box.
• Check if you are working from behind a proxy server. Some proxy servers have trouble correctly forwarding the results from the Google web service.
• Have you used up your daily limit of 1000 queries? You can easily keep a watch on the search counts because the software displays the number of queries made to the Google API.
• The Google web service client was probably not responding at the time you tested or there was a problem with your ISP. Wait for some time and try again.

Google API Search Tool Main