I am so frustrated with Aodbe releasing new versions incompatible with older versions! I work with Flash CS3. There are many good reasons why I cannot and don't want to upgrade. I have recently updated to Mountain Lion. Everything is good except that the extensions manager 1.8 (CS3) doesn't work on Mountain Lion - it crashes. But all the newer Extensions Managers don't see any older versions of Flash. So basically I cannot install any of the extensions, which are essential to my work!
I am thinking going back to Snow Leopard because of this ridiculous issue. Unless there is any other way to install extensions into Flash CS3...