@A. Lewis
"I've been trying in vain to get my workplace to switch to an alternative such as foxit for some time."
Apparently, you didn't actually READ the article:
The attack was first demonstrated last week by researcher Didier Stevens. By misusing a feature contained in the PDF specification, his proof-of-concept attack showed how hackers could embed a malicious payload in a document and trick Adobe's Reader and Acrobat applications - as well as the competing FoxIT Reader - into executing it.
Did you see that last bit? Foxit Reader is (was) vulnerable, too. The problem lies in the PDF specification, not in the reader. Last week, Foxit Software implemented a security fix in their reader to head off the problem.
"Adobe used to offer a 'lite' version with cut-down functionality (crazily it only allowed viewing PDF files, imagine!) But I see this has disappeared."
The Lite version has disappeared because is was third-party (unauthorized) repackaging of Adobe Reader, minus some features.