I had my problem when i was running the standalone version of TWS. I am using the browser version now and everything is fine with the exception of the charts loading painfully slow..... got any fixes for that?
i'm already having problems with API based GTD orders. can you IB people, please agree on one simple format and stop change it every build? same for API connection pop up. in previous version of TWS there is no pop up when you making connection via API, now it's back again. and what about those GTD orders? it use to accepted by TWS in EST, but after swithing to daytime it's stops working at all and no one knows why. after few days of trying i finally figure out that i have to use GMT ,now GMT stops working. sick and tired...
If the installer for the standalone version is confused about what version is currently installed, you should go to this page http://www.interactivebrokers.com/en/control/twscontrol.php?ib_entity=llc and install from IB's website