I purchased Version 3.0 as an upgrade and have Version 4128. Coherence is a mess. I end up with two mice on the screen or no working mice. It is not usable in Coherence which is my main reason for using. I tried the method of removing the Tools and re-installing but it did not work. I would like to downgrade back to Version 2.5 but cannot figure out how. Can you please help me with this....it appears I am not the only user with this problem and no posting has been made to fix this yet. Thank you.