Clasping at more straws....

My understanding from previous posts is that the embedded library uses Flash and the external one uses AIR. If you've not already tried it then consider reinstalling both Flash and AIR so they are on the latest versions.

Poser uses IE libaries so an IE upgrade is something to consider but would have thought there would be other posts regarding this issue if it was causing it. If you do decide to upgrade don't forget to create a system restore point before the upgrade so it can be rolled back if there are problems.

If you've not raised this with Smith Micro (even though technically they don't support it) it might be worth trying - you never know if asked they may decide to help (worst they can do is say is "no").

Another thought is to check the Microsoft Application and system logs (run eventvwr) to see if there are any errors around the time the problem starts that refer to memory or other resources - 90% of the time there isn't but occasionally this can provide some insight.