How dangerous is Trojan.Agent.ED

How dangerous is Trojan.Agent.ED?  I executed a Full 360 scan and Norton did not find any threats.  I executed a Malwarebytes Anti-Malware (Free) full scan and one threat was detected.  The threat is the following:  Files: Files: 1
Trojan.Agent.ED, K:\Program Files (x86)\IconCool Software\IconCool Editor\LiveUpdatePanel.exe, Quarantined, [67eae2154247c274200fe42e0af81ee2],
 

What should I do next and can I trust that the computer is safe now? 

I am using Windows 8.1 Pro 64-bit with Norton 360 version 21.6.0.32.