I'm sorry to hear that your average is so high, but if you don't need the money for the next 5 years my opinion is you shouldn't sell. Remember RDWR has NOT warned this Q or any other. There are almost no tech companies who have met expectations but RDWR has so far.
Think about it this way. RDWR is expected to increase earnings at an average of 55% per year over the next 5 years.
If you are confident in the company long term then you should be buying more now so that you can profit earlier. I have moved my average buyin price from 32 to 25 by "averaging down". But this is a matter of personal opinion and situation.