Kerbal Space Program

I have a small spaceship, craft file attached, named exa2.

I have copied it between two different games, "sim" and "freehold". I've checked that the cksum is the same for the two copies.

In the sim game it stands straight on the launch pad and does not fall over even when I press keys to try to tilt it.

In the freehold game it falls over quickly; clicking 'T' does not have enough force to keep it standing, although I can launch it successfully if I do so quickly.

It is as if it has a rotation started before I launch it.

I tried exiting and reloading the game without success.