Found a site with shockwave 11.03
It actually has several 11 versions. I chose the latest one 11.03. 472 and everything is back to work right again.
The site was awkward to access but once you're in its fine.
Once you choose your version click the big green arrow above the list of versions, not the centre of the page, that will just take you to the Adobe site and they will force 11.5 on you again.
Not sure if they are okay for Mac as well Nelson but maybe elsewhere on the site could be. GL