Did you press + on your screen?

Otherwise, you need to convert all of the files and then alter all of the files yourself, which is hell...

If you want to change all of files, go into each of the files and find the lines that say something like, MaxlInearspeed or the maxacceleration

or other way, is to change the mass of the ship (which will alter physics though)

you could edit the gameplay.constants file in the gameinfo folder of the mod

the lines you would edit are under shipSpeedPhysicsData which are looked at when you select the game option of ship speed

this way you could increase the speed of all ships by 3 or 4 on fast ship speed without having to edit every ship entity file.