Looks like only professional version gives you this option. I just checked, 2010 and 2013 standard version do not have this option. Professional version has this option.
This worked for me Thank you !
The only time I run into this if I’ve opened a file previously saved in a compatible format. I actually just resave it as a Project file, don’t even have to close out, and the inactivate button is active. File, Save As, same name with format of Project; overwrite existing file.
