what ftp software are you using?
Clear your browser cache and try again? If they sent you a file, just install it with the same name they gave you and it will be there.
Clear your browser cache and try again? If they sent you a file, just install it with the same name they gave you and it will be there.
make sure the file is actually getting uploaded, and then confirm that you are uploading it under you main FTP account, rather than an account created by some automatic software (like in the case of One Click Plugin updater, in WordPress)
If you can see the file in FTP, try to delete it again, and then re-upload (preferably in Binary Mode)
Is there only one domain in that public html folder?