Some Windows 10 users have experienced problems with RSS Authority Sniper not being able to successfully search for feeds or crashing during feed search.
1. Go to 'Windows Compatibility mode' for the application and change to Windows XP with Service Pack 3. (See this tutorial on setting compatibility mode in Windows 10 for a step by step on how to do that.)
2. Check your anti-virus/firewall software and make sure that there is an exception or whitelist entered for RSS Authority Sniper to make sure it is trusted to access the internet.