Click and hold the Vinyl button on the deck with the track you want to edit — you should see some edit controls show up on the screen, including “/2” and “x2”, which can half and double the BPM, respectively. (Note: I don’t have the prime go, but I’ve seen it done. Also some folks are experiencing problems editing grids since the 2.0 update, so you may run afoul of that issue)
Yeah, press the grid edit button (vinyl) and it appears on screen. This is the same in all versions.
I’ve not spotted any V2 grid edit buttons. I’ve spotted on the forum the grid not render fully for some users (half height) but the actual editing seems okay.