Theatrical release is 145-minutes long, edited down from a six-hour miniseries developed for German television (available in Germany on home video)
A 210 minutes Director's Cut has been re-released in USA on April 4th, 1997.
On the DVD release the subtitle content is significantly different from the version shown on cable. Hitler is not disparaged the same way at the going away bash for example.
A 293-minute version touted as the "original uncut version" and released on DVD in the US in 2004 is actually the original German television miniseries version. This previously aired in the U.S. on cable television's Encore channel.