If you're using the Lite version you need to use the AgentRansack.exe with the -o switch to output to a file, e.g.
AgentRansack.exe -d "C:\Program Files\Mythicsoft" -fex -f "agen.*\.exe" -o "E:\output.txt"
With the Pro version you can use the console app flpsearch.exe and output directly to the console, e.g.
flpsearch.exe -d "C:\Program Files\Mythicsoft" -fex -f "agen.*\.exe"
More information is available here: