Yes, I had installed it. And I have also reinstall it for all explorer versions and for ie9 64.
I start IE9 64, two instances of iexplorer opens in "task administrator, I open my gmail, I see FlashUtil64_10_2_161_ActiveX.exe is also opened. I open another tab for hotmail, another instance of iexplorer appears on task manager. And after writing and email, I tries to send it, but it does not work, I then try to change to gmail tab and ther explorer gets white with a "no responde" (in english "no respons", I have an spanish version of windows and ie9) One of the iexplorer instances in task administrator shows 50 % of CPU (one of the CPU of my Athlon II X2 250 is 100%, the other is normal) for several minutes until I end iexplorer process through task administrator.
Other times, ie9 seems to be hang, when I click refresh (F5), it shows a dialog "google.com no reponde" (google.com does not responds), I click on cancel, then reloads the page and continues working.
In fact, I am writing this using firefox because I do not trust it ie9 too much, so I do not want to lose all I have write.
Thanks in advance.