Currently I have version 3.3.4.1 But I want to install the latest version of FileZilla FTP Client.
If you installed Filezilla from a repository (not from source), then the following command should update all applications installed in your system (not just Filezilla and not just openSUSE) to latest available. If the website says a later version has been released, it might not have been built for openSUSE yet… Recommend waiting until a version is built so you can automatically update instead of manually re-installing later.