I discover that FC10 is released, and I already downloaded the new version. Look good and I want to upgrade and buy. I have some questions, please bear over with me

All the component and the devices are they taken from same lib. as in FC9 or do we have the risk we have to start from beginnig again, here I think with bugs?
Does FC10 use the same Toolchain as FC9 or do we have to install new, and if yes, where can I download these?
I have until now upgrade all from Ver. 3 to Fc9 and the proffessional version with all devices and component exept DSP. As far I see are these now free or do I have to pay for these again?
Is it possible to edit or use older flowcode project from ect. Fc 7,8,9 in FC10?
I want to have all the same devices component ect. as I now have in FC9, what do I have to pay for is it only for the new platform FC10?
Please guide, help and advice

Best regard
Jorgen