Oh, OK. I wonder if you're using the standard unzipper that comes with Finder or you're using a different one. Sometimes 3rd party zip programs won't set permissions correctly. Try right clicking on the zip file and choosing

"Open With" -> "Archive Utility". Move that file to the Applications folder and try again.

If that doesn't work, you can edit the permissions manually. Open a terminal and then type

cd /Applications
chmod +x FE7x.app/Contents/MacOS/*

And then try to run it. The "chmod +x" command is saying: "Make all of the files in this folder executable."

https://superuser.com/questions/898124/the-application-someapp-app-can-t-be-opened

Good luck!