Adobe Flash settings manager problems

Ever since updating Flash Player past version 9 I have been unable to use settings manager, the box freezes the page and will not respond, even to attempts to close out of it,I found that reverting to any of the version 9 flash players made settings manager responsive again, although that leaves me with a lot of pages that will not work correctly due to needing the most current flash player. I can also utilize the settings manager if I use portable Firefox. After reading a thread on Adobe I logged out of my computer user account and logged in as a different user, oddly enough settings manager was totally responsive. This problem keeps me from using websites that do video calls and web conferences online. The day that I upgraded to the current flash version 10.0.22.87 the settings manager worked correctly, 2 days later it had stopped responding. This is a Sony laptop, running Vista Home Premium. If settings manager works with a different user logged on it obviously is not the computer, or the registry that has problems, I have also tried running Firefox in safe mode so all addons are disabled, that did not work either.I do not have this problem on a machine running XP. Any help appreciated.