Warning: Install folder still exists! - NO INSTALL FOLDER

Hi, I promise I looked through other posts, as this seems simple enough...
On my admin screen I get the "Warning: Install folder still exists!" message. Okay, no problem, lets go remove the Install folder. Problem is, I don't see one anywhere? I'm looking in the root directory that opencart is installed in, and see nothing. Am I missing something? Is it called something other than "Install"?

Thanks

Its called install. What do you mean you see nothing? Dont you see the admin , catalog, system and image folders?

No, I see all of those, I just don't see any Install folder to remove. This is why I am not sure what is causing the Warning.

These are the directories I see in my folder where Opencart is installed:
-admin
-catalog
-download
-image
-system

Try clearing your cache.

Still nothing - although I am using an FTP program, I still refreshed my file list.

Hmm. Even though I had cleared my browser cache and even restarted my computer, it was still there yesterday, and mysteriously today it is gone. Weird! Thanks for the help!