Roundabout Civil Tools

I have been playing with the roundabout tools in the Civil enhancement.  Every once in a while when editting or adjusting part of the roundabout, Microstation locks up on me.  I need to reboot to get back in.  When I get back in the Civil Task does not show on the task manager anymore and my toolbox is gone (but the civil accrudraw and civil help still shows).  I need to remove my interface and UPF and create new ones to get them back.  Can someone explain either what I'm doing wrong or the software is doing?  Is there an easier way to get the Civil task back in the Task Manager?

Thanks!

Dave