I am getting the same problem, i.e., keep getting Upgrade message when I try to execute NFL Mobile. When I try to execute the application, I get a message "Please click on 'Upgrade' to get the current version. When prompted, select Overwrite and then Run." It apparently loads nfl-prod.apk and I get "Download complete" message But I never get the Overwrite prompt message, When I try to execute the application again, I get the same "Upgrade" message. I am unable to execute the NFL Mobile application. Any ideas?
What you have to do is make it where your phone can do non market place programs. Then download it again and click on the notifcation after it downloads. It will install the program and it should not ask again until they update it again. As for the deleting all the other ones you downloaded you need to get a file manager( Estrongs is a good one) and look for the file. You should be able to delete them from there