IMovie crashes on startup

I've just installed iMovie from the App Store. When I run it, it crashes after the Welcome wizard. I've rebooted, deleted and reinstalled, and the same thing happens each time.

I've tried opening with Cmd and deleting preferences, I've deleted everything in ~/Movies, ~/Library/Containers/com.apple.iMovieApp, it still crashes every time

2014 MBP, 16 GB RAM, just installed 10.13

There may be vestiges of old iMovie installs/projects laying around; if there are, I'm OK with completely deleting them, if someone can tell me how to hunt them all down

Crash report

Process: iMovie [1107] Path:
/Applications/iMovie.app/Contents/MacOS/iMovie Identifier:
com.apple.iMovieApp Version: 10.1.7 (310090) Build Info:
iMovieX-31009000019000000~1 App Item ID: 408981434 App
External ID: 823649006 Code Type: X86-64 (Native)
Parent Process: ??? [1] Responsible: iMovie [1107]
User ID: 501

Date/Time: 2017-10-01 19:33:44.776 -0500 OS Version:
Mac OS X 10.13 (17A365) Report Version: 12 Anonymous UUID:
1BAD87A2-DB4E-312A-643C-36D1F4BE862D

Time Awake Since Boot: 2600 seconds

System Integrity Protection: enabled

Crashed Thread: 4 Dispatch queue: com.apple.root.default-qos

Exception Type: EXC_CRASH (SIGABRT) Exception Codes:
0x0000000000000000, 0x0000000000000000 Exception Note:
EXC_CORPSE_NOTIFY

Application Specific Information:
-[QCCGLRootContext minimalSharedContextForCurrentThread]: Inconsistent state abort() called HÇƱˇ