I had to convert my project suite to the newer version which is no problem. Unfortunately I noticed the same behaviour regarding the NameMapping, a few controls can no longer be found. After remapping I wanted to save the NameMapping file by clicking the X in order to close the document. I should not have done that, TestComplete crashed. I tried that again. Same behaviour. Workaround: Press Ctrl-Shift-S to save. I switched back to previous version because I do not need the new features and the release got more unstable.