I need help setting up Cableguys Midishaper, please.

I'm still new to Studio One 3 and I'm having some difficulty with a few things.

I just bought Cableguys Midishaper and although they have specific instructions on their website for setting up Midishaper in Studio One I'm following the instructions to the letter and I still caot get this thing up and ruing on any software instrument.

If anybody on here uses this plugin I would really appreciate your help in learning how to set it up, this is my main reason for posting this.

But, on a slightly different note could somebody explain to me why some AU plugins seem to not function properly within Studio One whereas if I use the VST version the plugin functions? I've just moved to Studio One from Logic and I use a Mac and always within Logic I would use AU versions of everything as I thought they were the best and most stable version for Mac, so I'm a tad confused.

Thanks in advance if anyone can help.

Take it easy,

Jason.