Interestingly, just installed JetPack, see if I could. After a few re-uploads of the above files, managed it. But on the Sharing settings page, in available services, I have the following error:
Fatal error: Cannot access parent:: when current class scope has no parent in /…/wp-content/plugins/jetpack/modules/sharedaddy/sharing-sources.php on line 191
Could all of this be linked?