There is an updated Adobe Connect Add-in located from any Adobe Connect meeting room under the Help menu item on the far right of the room.
Here is a direct link to the always updated version of the add-in:
http://www.connectusers.com/downloads/
That add-in will work with Connect 7.5 and 8.
Make sure with Connect 8 you have updated your Adobe Flash Player to version 10.1 or the latest which is 10.2. 10.3 is in beta now.
You have to use Flash 10.1 with Connect 8 to take advantage of some significant features including enhanced audio and VOIP, using Adobe Presenter content to upload to Connect 8, Screen Share pod and the File Share pod. This is an important consideration. There are very significant desktop performance improvements with Flash 10.2 using the GPU for many of it's graphic functions which reduces the load on the CPU.