Original: With the end of the Nazi regime in 1945, the Horst-Wessel-Lied was banned, and the lyrics and tune are illegal in Germany and Austria except for educational purposes.
Simplified: With the fall of the Nazi regime in 1945, the Horst-Wessel-Lied was banned, and both the lyrics and the tune remain illegal in Germany and Austria to this day except for educational and scholarly uses (under sections 86 and 86a of the Strafgesetzbuch).