The window at the top allows selection of the 'rides' (only one exists at this time). Click 'select' at the bottom, and optionally rotate it, then move the cursor to where you want to place it, and click again.
The shop can be placed next to a path, or on the ground.
Lack of supports was always somewhat of a problem, and now it has become really useful to spend some time on it, as it is quite impossible to see where you put the shop.
Other issues that must be resolved are the fact that there is a gap in the path just before the shop, the path has to be extended to the front of the shop.
Also, when placing a shop at the ground, you lose the ground surface (you can see this near at the right back of the bottom shop). This is however not a big problem, it just needs a bit of shuffling of data in a voxel, so you can have a voxel with both a shop and ground surface.
