Version 6.3 is the worst RW version I have ever used. Load time of my project is annoying. I had to deselect the auto save feature, since this was blocking the application every 20 to 30 seconds. Very often, it seems that RW has crashed. The interface is blocked. Up to now it was a reliable tool! Now it is hard to use, thanks Realmac!
By the way, why you don´t you fix that annoying interface bug with the elements library pop up? All in all, RW is performance-wise a pain in the a…! However, there are no real alternatives available!