"Only one iOS Simulator can run at a time" error message with Xcode 4.6.3

[klongDSR]

Since I updated to Xcode 4.6.3, when I launch WhazzerFinger I get "Only one iOS Simulator can run at a time. Please quit iOS Simulator and try again." I did not get this with the previous Xcode version.

It does still seem to record videos fine, though the contents of this window get captured in the video.

Here is a screenshot of the error message:

[zippy1978]

Thank you for the info.
I will have a look at it when I have time.

Regards,
Gilles