COPro 7 Preview Creation Problem

After having tried COP 7 and Mountain Lion and having run into a convoluted amount of issues I went back to Snow Leopard and tried again. Tethering now seems to work for my Canon 5D II and my 1DX. But I'm still having problems with the creation of previews, particularly when importing files from a card reader. It takes forever. The importing of files ends and the creation of previews goes on and on. Sometimes it just get's stuck or crashes the computer. Then, if it does manage to get all the files into a session and finishes the preview creation it will have issues bringing up the previews when I click on the thumbnails. I'll only get half an image or 2 halves of 2 different images. If I got back and click through a few other thumbnails and come back to the first one it will sometimes fix itself. I'm on a 4 year old MacBookPro that hasn't had any issues until I tried updgrading to Mountain Lion and COP 7. Going back to Snow Leopard immediately smoothed out a few things over all but the glitches with COP 7 continue.

I can't believe how much time I've eaten up over the last few WEEKS trying to get everything working again. Heeeeeelllp!!!

😕

Thanks

A.T.