I'm running Flash CS4 Version 7 and I want to add html5 to the publishing options via the Google swiffy extension, it said it needs CS4 or later. Got an installation error message:- needs Version 10.
After much searching, eventually found the Version 10 download link (Version 10.0.45.2.) and ... an error message - Whoops broken link. The same Adobe page has a Version 10 older link (Version 10.0.42.34.) so I downloaded that & unzipped it.
Installation is certainly not intuitive, various files to run are hidden in sub directories, and the pdf is not very helpful. I eventually got an error message ... there's a later version of the software available, please use that.