AppCode 2.5 crashes every time when trying to start the simulator

After upgrading to 2.5, I can't run any project anymore. simlauncher5 crashes every time with this trace :

"/Users/dude/Desktop/some-ios/build/Debug Production-iphonesimulator/some-ios.app"
2013-10-16 15:32:29.497 simlauncher5[26919:3503] -[DTiPhoneSimulatorSessionConfig setSimulatedArchitecture:]: unrecognized selector sent to instance 0x7fb4d5902460
2013-10-16 15:32:29.498 simlauncher5[26919:3503] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[DTiPhoneSimulatorSessionConfig setSimulatedArchitecture:]: unrecognized selector sent to instance 0x7fb4d5902460'
*** First throw call stack:
(
 0   CoreFoundation                      0x00007fff89920b06 __exceptionPreprocess + 198
 1   libobjc.A.dylib                     0x00007fff8bc893f0 objc_exception_throw + 43
 2   CoreFoundation                      0x00007fff899b740a -[NSObject(NSObject) doesNotRecognizeSelector:] + 186
 3   CoreFoundation                      0x00007fff8990f02e ___forwarding___ + 414
 4   CoreFoundation                      0x00007fff8990ee18 _CF_forwarding_prep_0 + 232
 5   simlauncher5                        0x0000000106e13a97 -[Launcher createConfigWithSdk:] + 188
 6   simlauncher5                        0x0000000106e13667 -[Launcher launch] + 580
 7   Foundation                          0x00007fff918ef562 __NSThread__main__ + 1345
 8   libsystem_c.dylib                   0x00007fff8a53d772 _pthread_start + 327
 9   libsystem_c.dylib                   0x00007fff8a52a1a1 thread_start + 13
)
libc++abi.dylib: terminate called throwing an exception

Process finished with exit code 134