My most obvious problem was the loss of product descriptions, but the images would not display in admin either, I was getting an error when it tried to process images.
To get the site up I had to reapply the SEO etc contribs to the categories.php supplied with the simple add-on. From my reading of the code differences in the PayPal module the main differences seem to be in the addition of recurring payments, something we don’t use.
There is come clash with the paypal module (from the Paypal site) & the simple addon but Im sorry but I failed to nail it down. :blush: