watchOS 1 storyboard crashes in Xcode 7 - watchkit

Question

I am converting my project over to Xcode 7 and Swift 2. I also had a WatchKit Extension, and I allowed Xcode to convert that to watchOS 2.
When I go to open the storyboard, I get this crash. Are some storyboards broken and so they need manual adjustments?
Process: Xcode [97053]
Path:
/Applications/Xcode-beta.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 7.0 (8163.8)
Build Info: IDEFrameworks-8163008000000000~7
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [97053]
User ID: 504
Date/Time: 2015-07-16 18:39:19.620 -0400
OS Version: Mac OS X 10.10.4 (14E46)
Report Version: 11
Anonymous UUID: 56576435-6521-AF4C-A27C-F5E11A057A25
Sleep/Wake UUID: BAA76D42-23AC-45B6-A291-6CFFB2574157
Time Awake Since Boot: 1300000 seconds
Time Since Wake: 10000 seconds
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Application Specific Information:
ProductBuildVersion: 7A152u
ASSERTION FAILURE in
/Library/Caches/com.apple.xbs/Sources/IDEInterfaceBuilderCocoaTouch/IDEInterfaceBuilderCocoaTouch-8124.4/InterfaceBuilder/RemoteToolCommunication/IBObjectMarshalling.m:694
Details: Failed to launch remote tool: Failed to find or create
execution context for description
System content
2x for IBIPadFramework w/ default fidelity: Failed to find a suitable
device for the type SimDeviceType :
com.apple.CoreSimulator.SimDeviceType.iPad-Air with runtime SimRuntime
: 9.0 (13A4293g) - com.apple.CoreSimulator.SimRuntime.iOS-9-0 (Failure
reason: Failed to create new simulator device that matches
SimDeviceType : com.apple.CoreSimulator.SimDeviceType.iPad-Air for
runtime SimRuntime : 9.0 (13A4293g) -
com.apple.CoreSimulator.SimRuntime.iOS-9-0 ((null)))
Object:
Method:
+valueForKeyPath:ofClassNamed:usingMarshaller:targetRuntime:context:explicitScaleFactor:diagnosticsBlock:
Thread: {number = 1, name = main}
Hints: None
Backtrace:
0 0x000000010b5630f7 -[IDEAssertionHandler
handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:]
(in IDEKit)
1 0x000000010a16e7f2 _DVTAssertionHandler (in DVTFoundation)
2 0x000000010a16ea09 _DVTAssertionFailureHandler (in
DVTFoundation)
3 0x000000011a88a32f (in IDEInterfaceBuilderCocoaTouchIntegration)
4 0x000000011a889eda (in IDEInterfaceBuilderCocoaTouchIntegration)
5 0x000000011a86d3cf (in IDEInterfaceBuilderCocoaTouchIntegration)
6 0x000000011a86daf1 (in IDEInterfaceBuilderCocoaTouchIntegration)
7 0x000000010a1a9464 __DVTDispatchAsync_block_invoke (in
DVTFoundation)
8 0x00007fff98b87323 _dispatch_call_block_and_release (in
libdispatch.dylib)
9 0x00007fff98b82c13 _dispatch_client_callout (in
libdispatch.dylib)
10 0x00007fff98b8ecbf _dispatch_main_queue_callback_4CF (in
libdispatch.dylib)
11 0x00007fff92ea33f9
CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE (in CoreFoundation)
12 0x00007fff92e5e68f __CFRunLoopRun (in CoreFoundation)
13 0x00007fff92e5dbd8 CFRunLoopRunSpecific (in CoreFoundation)
14 0x00007fff8d77456f RunCurrentEventLoopInMode (in HIToolbox)
15 0x00007fff8d7742ea ReceiveNextEventCommon (in HIToolbox)
16 0x00007fff8d77412b
_BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox)
17 0x00007fff8cbab8ab _DPSNextEvent (in AppKit)
18 0x00007fff8cbaae58 -[NSApplication
nextEventMatchingMask:untilDate:inMode:dequeue:] (in AppKit)
19 0x000000010a72b5fe -[DVTApplication
nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit)
20 0x00007fff8cba0af3 -[NSApplication run] (in AppKit)
21 0x00007fff8cb1d244 NSApplicationMain (in AppKit)
22 0x00007fff8b7255c9 start (in libdyld.dylib)

Answer 1

Navigate to "/Library/Developer/CoreSimulator/Profiles/Runtimes", then remove the runtime - the runtime is old. After, reboot Xcode7, and launch the Simulator...
See more at, Xcode 7 Beta 4 no simulators and can't open nibs.