File Extension UPJ File Format ULead project file UPJ stands for ULead project file. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Which is better: Fast-Tracking and Crashing? Vulnerability Test analysis Is there a way to fix corrupt ms project file?