iMovie 10.0.9 crashes on opening
New 10.0.9 version of iMovie crashes on opening (after showing the welcome screen and 'get started'). Start of crash log shown below. It crashes the same way in my 'guest user' account so I don't think it's my personal settings. But I did try deleting any iMovie plist files in my account and that didn't help.
Process: iMovie [4730]
Path: /Applications/iMovie.app/Contents/MacOS/iMovie
Identifier: com.apple.iMovieApp
Version: 10.0.9 (266479)
Build Info: iMovieX-26647009040000000~1
App Item ID: 408981434
App External ID: 812661454
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: iMovie [4730]
User ID: 501
Date/Time: 2015-07-02 11:45:07.153 +1000
OS Version: Mac OS X 10.10.4 (14E46)
Report Version: 11
Anonymous UUID: 7B3122EA-64CE-1823-F71A-6F734A887ED7
Sleep/Wake UUID: 3E99FABE-D504-4D22-9F1F-26AA1E4BD015
Time Awake Since Boot: 22000 seconds
Time Since Wake: 7400 seconds
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Application Specific Information:
*** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[0]
abort() called
MacBook Air, OS X Yosemite (10.10.4)