\documentclass[9pt]{beamer}

\usepackage[cp1250]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}

\usepackage[czech]{babel}
\usepackage{color}
\usepackage{beamerthemesplit}

\title{XY}
\subtitle{AB}
%\author{\includegraphics{Logo.png}\hspace{\stretch{1}}Aaa} % Not working
\author{Aaa}
\date{\today}

\setbeamertemplate{blocks}[rounded][shadow=true]

\hypersetup{pdfpagemode=FullScreen}

\begin{document}

  \frame{\titlepage}

  \frame{\tableofcontents}

  \section{1}
  \begin{frame}{}
    Frm1
  \end{frame}

  % Last frame

  \section{}
  \begin{frame}[plain,c]{}
    Thx
  \end{frame}

\end{document}
