So why offer Flash 13 upgrade to OS 10.9.2 if it is NOT working????

I have spent about 45 minutes trying to install the 'new' update for OS 10.9.2, following all instructions, disabling possible problems with extensions, and uninstalling last version.  No success, and then find something saying there is a bug in new version?  why in the hell do they even offer it until it works?  VERY frustrating, and sorry not other options with browsers.