When I try to start BricsCAD now I get a message stating "Xerces Error - Fatal Error at the file /Users/Bill/Library/Preferences/Bricsys/BricsCAD/V16x64/en_US/Support/default.cui, line 1, char 1. Invalid document structure". This happens when I click on a cad file to launch the program and when I click on the BricsCAD icon to launch from scratch. After starting it asks if I want to start a file from scratch, open a file, etc. BricsCAD still starts after this, but my menubar is not there. Has anyone else had this problem? Any idea how to fix it? Thanks.