Tuesday after reinstalling TWS about 9:50 am, it vanished from my screen. I pulled it back up and it had a popup about auto logoff. I reset if for 4:00 pm and it was ok. I was also having a problem with p/l from the previous day remaining on my screen the following day. They told me to delete the entries in a couple of files so I did and the old p/l dissappeared. This morning I deleted the files before starting and the old p/l wasnt there but about 9:50 my screen dissappeared. This time I had a sell stop on the screen and by the time I got it back up the stop had been actived and I was down a couple of points. Evidently I also deleted the files that had my updated settings for the logoff. Live and learn. I am posting this in case some of you run into the same problem. I do not understand why they even have that auto logoff feature. If you install TWS be sure to go into the settings and set your logoff time or you too may get a suprise