Introspector ArgumentError: error #2004 4096

Hi,
I have following problem, every introspector usage (error, f12) throw me this alert message: "ArgumentError: error #2004 4096" (second F12 will start introspector window, which doesn't work and doesn't close with app, but application can be closed) and after closing window (after error) application still runs, so i must close it in task manager. Error isn't in application, i tried it on another PC ant it work correctly. So I tried reinstall Air, but without effect. This problem start from sec. to sec. without any action with air or any other.
Can someone help, what should i try?
Thanks!

Edit:
I solved it, any old cache bug it. Delete \Users\USER\AppData\Roaming\APP_NAME.(ANY_HASH) folder to fix it.