Hello EdwinHz,
Thank you for the quick reply. Yes, I already knew you cannot copy directories or otherwise manually try to clone a project. I followed the instructions in your mcuxpresso documentation, I selected the project to copy in the IDE navigator, did a clean, then clicked the menu item "copy", then clicked the menu item "paste". The IDE does a bunch of stuff without error and the new named project looks good. As your documentation states, I deleted the copied Launch configurations. I am able to build it without errors, but no matter what I do to create a Launch configuration, debug or release, I get this javascript null reference internal error.
I am running on Linux Mint, so it's not possible to install if I do not have administrator priviledges (it installs in /usr/local/mcuxpressoide/ide, a root owned directory). I have installed many revisions of mcuxpresso without problems on this machine (I am very experienced with this software, have created many previous projects with copy/paste, and have never run into this problem before).
Robert