From the PGN tab you can strip moves from any point in a game, either to the end or from the beginning. Just right-click any move in the tab and it will show up as an option.
Scid strip moves

What are you trying to accomplish? You want all empty games with headers?
If you just want an empty database you can create a new one.

I want to work the middle game of my repertoire.
So i go to 20moves of my chessbase and then try to find a plan to play and then try it against the computer.
Boring to click all the moves each time to the 20th...
So if i can erase the 19 moves before it will be really cool.
And this with the base and not game by game.
Hello,
I would like to strip moves (from the start) for a base with Scid vs pc.
How can i do this please ?
If it is not possible is there a free soft who can do this ? (lucaschess, arena ?)