How to install U3 Apps to your U3 Drive

I have a san-disk U3 Drive and I wanted to update my version of keePass that I run on it.

I downloaded a U3 version of keepass and do you think I could install it?

Basically you will download an archive file like a .zip file. If you extract the zip you will find folders like, data and manifest but no installer.

To add an application you do the following