I cannot figure out how to get the various castle parts etc, I can only load the tower, one house type and a stall with seating and for the life of me cannot find the other options, the rocks show options but nothing else does, is there something I am overlooking?

ok its OK I figured it out

the scroll wheel

while trying this on my laptop, I discovered that I can do a scroll gesture by using two fingers on the trackpad - I’ve had this machine for two years and I never knew! Useful in many of my programs - but for some reason, it still doesn’t work in Flowscape. Please could you add a hotkey option? Your current option that affects brush size, still affects brush size when these tool are active.

I whipped one up, it's awesome (flowscape not my construction)  but sadly this was too big to save as most of my scenes seem to be