might have a work around as I have this annoying problem... leaving the window open, or in minimise on the taskbar I get the violation error after only a short period of inactivity... but I have found that if I close XoloX by clicking on the close icon, so now XoloX is only an icon on the taskbar, the 'crash' doesn't happen, and the downloads and uploads still continue as normal. I have been doing this 2 days and it works for me. Try it!
John