I am having this exact same issue. It started a month ago and I've tried just about everything including removing programs installed since right before it started (this is on my iPad)
I am on the latest version of ThinkBook and on ios 10.3.2
Today, something different happened. It did what it's between doing where I get the splash screen and then it crashes, except, this time the window is in the background. If I try to go to it, however, I get knocked out. It's different this time in that it is staying open in the background, but it keeps kicking me out instead of completely crashing. The only thing that has changed since I last worked on this is that I've removed some other apps I found had been installed around when this began. That's it, though.
Any help would be greatly appreciated! I really want took get back to using this instead of other stuff. Thanks!