The use of Cornucopia3D items in other Vue versions has mainly to do with encryption . If you bought encrypted items they are bound to the INST code of the version you have bought them for. Vue 6 Infinite will automatically detect a prior installation with its code and let you use your encrypted items then for Vue 6 Infinite.

If you have changed license  you need to download the encrypted items again from Cornucopia3D. One reason why you have five downloads for each item - and can let them be resetted if you need more.

Regarding the vine - is there any program that can do what you want to have? I can not really see that, especially in a program that is not a high specialised modeller. But maybe one day...

As Dave mentioned, you always can paint in items you need with the eco painter and then get what you want through this.

One day your ship comes in - but you're at the airport.