FX Maker - Particle scaling

I know this isn't strictly unity as I'm using something I bought from the asset store called FX maker for cranking out some particle effects. However I DID try and make my own particle straight in my unity scene and the same thing happened. Anyhow I thought perhaps someone here might see this and could help...

Firstly I'm a newbie on Unity 3D - although I've been a games artist for over 15 years now (some experience fiddling with settings etc...)

I bought FX maker which seemed brilliant until I exported a package and then tried importing it into my scene. Basically the effect I'd made turns out to be huge and none of the settings I have tried seems to change the scale.

SO... I go back into FX maker and notice that you can change the size within the package so I do that. Great it's smaller now. So I re-export it and delete and re-import it into my scene.

And it's the SAME SIZE.

I've spent a fruitless day on this. Hopefully someone who's more experienced than me can point me to a simple tick box or something that I might be missing as this is driving me insane.

Regards,

Kelvin