Contextcapture update 15 - crash when importing modified geometry

I just upgraded contextcapture (yesterday) from update 14 to update 15.  I have a project running that I needed to modify the geometry (delete part of the mesh).  So I generate DGN for modification in the production, modify the files in microstation update 13, try to import, CRASH.  Program closed. no message, no nothing.

I tried to regenerate the model using contextcapture 15, regenerate the DGN, try importing back. Same result.

Now I'm trying to re-install update 14...

Not happy