Multiple Omnifocus app files?
 

How come I suddenly have multiple Omnifocus app files in my Applications folder? Attached is a screenshot.

How did this happen? Is it safe to delete the others?

It's safe to trash the old ones. I suspect you selected the option in the Update dialog to keep past versions of the program.

Thanks for the reply.

Not only is it safe to trash the old ones, it's a good idea. You can get some puzzling behavior if one of those older versions gets launched instead of the current one.