Editor Preview Slowing Down

Hi,
I'm using the Magic Particles 2.18 (Dev) editor and the particle viewer seems to slow down after using it for a while (around 10-15 mins). It seems to slow down more and more until I restart it and then it is fine.
Has anyone else noticed this?
I'm using the Magic Particles 2.18 (Dev) editor and the particle viewer seems to slow down after using it for a while (around 10-15 mins). It seems to slow down more and more until I restart it and then it is fine.
Has anyone else noticed this?