adobe premiere pro won't reopen

I've already installed and used premiere, and its listed under my installed apps in the creative cloud. but now that i'm trying to start a new project and need to open the app again, it literally won't open. i've clicked the open button but nothing happens. do i need to update the entire creative cloud? I'm worried that any updates won't be compatible with my mac. Help would be greatly appreciated, project is a school assignment due this week.