C:\Users\kilos>cd downloads

C:\Users\kilos\Downloads>Shimeji-ee.jar
'Shimeji-ee.jar' is not recognized as an internal or external command,
operable program or batch file.

C:\Users\kilos\Downloads>start Shimeji-ee.jar
The system cannot find the file Shimeji-ee.jar.

C:\Users\kilos\Downloads>java jar -Shimeji-ee.jar
Error: Could not find or load main class jar