The easiest solution is probably setting up a .bat file to launch your server through it, following the official instruction.
To be short, you can create a text file using Notepad or Notepad++, changing its file extension to .bat, containing the following lines:
java -Xms512M -Xmx4096M -jar Thermos-1.7.10-1614-server.jar
pause
Of course, if your Thermos file is called "Thermos-1.7.10-1614-server.jar". The "pause" thing allows you to have time to see the console output even if you stop your server or if it crashes (normally the command line window will disappear in this case).
