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?
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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 ?)