Since version 9 Live is 64 Bit only. It's an important move, but you always have to deal with musicians who rely on old plugins that won't work in 32 Bit mode -

Since version 9 Live is 64 Bit only. It's an important move, but you always have to deal with musicians who rely on old plugins that won't work in 32 Bit mode - so backwards compatibility is an issue. correction: They still offer a separate 32 Bit installer - didn't realize, never looked back.