You used to? How long ago, and have you changed hardware since then?
Some tricks to increasing frame rate: Turn down graphics in-game, possibly changing the Windows theme to something less visually intensive, close out of any unnecessary programs, make sure your Windows Power Options are set for maximum performance (should not be an issue on desktop).
I remember back in Nexon when a lot of users recieved a Frame Rate issue and they released a update which fixed it, hopefully this will happen here, I personally don't have this problem but as above try some of the things mentioned.
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Some tricks to increasing frame rate: Turn down graphics in-game, possibly changing the Windows theme to something less visually intensive, close out of any unnecessary programs, make sure your Windows Power Options are set for maximum performance (should not be an issue on desktop).
Much needed features on a forum
Mike