I've figured out that this plugin will cause a major slow down with selecting, component editing, layer visibility switching, and something else.
I hope I was wrong but when I suffer with the annoying problem, there seems no way out, but when I disable this plugin, everything gets back to fine normal. I don't know why this would happen, but it really occurs on my larger models.
It's bad to me, 'cos I've already hidden everything in the window include the menu bar, then, how can I bring it back again?? I've got nothing to do with my Sketchup now even if I reinstalled both SU and this plugin. Please tell me.