RBRPro does not require the installation of the original game. It is completely standalone.
We can support you through our facebook group or our Discord Channel. You will find the links in the manager.
Only some events (six events per season) are reserved to donators. You will find further details in our Championship guide.
To unlock the full features you have to register and become a donator. It all can be done from within the manager. It's very easy!
When you register, you are asked to use the same nickname you have on rbr.onlineracing.cz. If you are using the nickname you have on CZ to login and this doesn't match the one you have in RBRPro, you will not login to RBRPro and won't get your profile page. To fix it, just replace the username with the nickname you are registered with in RBRPro and then paste you driver Id. Once logged in RBRPro, you can make a nickname change request by clicking on your nickname in your driver profile page (i.e. the page where your photo is)
If you don't remember your nickname, check the email you received when you registered in RBRPro or contact the RBRPro technical support.