You can try to repair your installation with Steam. Right click on RW, select properties, goto local files tab and then use the button "verify game cache integrety" (sorry using a non-english Steam client, but you'll find it I hope). Afterwards you should clean the blueprint cache before the next launch of RW.
Please note: english is not my native language, sometimes I may not use the right words to describe what I want to say.
I don't mean to offend anyone, but irony and sarcasm may get lost in translation