Can you get a callstack for the crash? The debug (pdb) files are installed with NORMA, so you should be able to get a full stack trace. There are some tips about how to do this in the readme, but it is straightforward if you're used to debugging in Visual Studio. Just attach another VS process to the NORMA devenv.exe.
Can you right-click and reset the toolbox before dragging anything out?
NORMA writes data to the HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\11.0\ORM Solutions\Natural ORM Architect\ToolboxRevisions key to indicate the NORMA extension assembly version [the core is treated like any other extension, you just can't turn it off] used to populate the toolbox. You should have non-admin permissions to read/write this key.
Let me know if any of this helps.