Just a quick fix if you happen to be using Mimo with Giganews, which by the way, is the BEST Usenet provider in the known universe. I ran into a problem where Mimo wouldn’t start. The splash screen hung at “Registering RMI Server” and then eventually just closed down. No logs. Nothing in the console.
Support didn’t know what to do so I just guessed and added this to the startup arguments “-noRMI”. It worked!
On a Mac, you can do this:
sudo /usr/libexec/PlistBuddy -c 'Add :Java:Arguments string "-noRmi"' /Applications/Mimo.app/Contents/Info.plist
On Windows you will probably need to modify the shortcut or find a batch file to launch Mimo. I don’t have Windows so I can’t help you there.
Update 2014-02-20: Found this on their change log for an OLD version:
“Add a -noRmi option for Mimo startup”