What are the extra plants in the “Add-ons” folder and how do I install them?
You need to purchase licenses for these extra plants. The complete bundle is just under $99. To install them, unpack the file in the Plant sub-folder of Vue 4 Professional folder, then create a new scene and open the Plant Browser (Objects|Create|Load Plant Species). The software will prompt you to enter the code for each plant in turn. Enter the corresponding code and enjoy!