Thanks for trying! Could I ask what your audio settings were? Are you using an ASIO driver or default Windows DirectSound driver? Did the crackling occur during playback or when direct monitoring?
I experience a bit of crackling when I use any plugin or effect, when not connected to an audio interface and when using the Windows driver. This is common as the buffer size isn't optimised and the built in sound card doesnt have real time processing and recording capabilities. But when I switch to ASIO and an audio interface, the crackling disappears.
Also, could you try running the plugin with the performance switch(top right, next to the Open and Save buttons) turned to the off position?