Welcome!

Got banned after so long, 3 day ban. I haven't logged into my account for 3 days, come back on and boom banned. L0L

It has been working fine and suddenly today after restarting my computer I can no longer open 3 instances of runemate. I currently have two open but for some reason when I open the third one and log into runescape it crashes. What could be the problem? I have tried re-installing Java. Still...