The rFactor 1255 patch (build F) was created to address some online security issues, add additional overall stability, and match the new retail DVD version recently released in Europe. 1255 F offers a significant improvement in game peformance over rFactor 1250.
The update consists of:
PLEASE NOTE: You will be required to reactivate rFactor if you upgrade to v1255. Before you do this, locate your original confirmation email. Make sure you can locate your Activation Number, Order Number and email address used. If you need a new confirmation email sent out to you, visit TryMedia.