Saw this problem in V12 Draft and the fix was to edit the Registry and delete the following toolbars key:
Hkey_Current_User\Software\UnigraphicsSolution\SolidedgeApplication\Detail\Toolbars
Tom,
I have legacy 2D files in both EMS and Microstation formats that I convert to SE for ECP work; however, we seldom create models from the .dgn files. I can tell you that the conversion to .dft is usually very good with minimal data loss. When we chose to go with Solid Edge the decision was...