Having similar problem on freshly installed Windows 11 - MC 29.0.50 (also tried MC 29.0.62 from latest channel) 64bit. Sound is OK, however application crashes randomly (during opening Options dialog or clicking through different sections, or opening DSP Studio. Crash never occurred during regular playback.)
Installed plugins - Sound ID Reference (by Sonarworks), tried to disable
Output - tried WASAPI, ASIO Fireface 802, ASIO MADIface USB, still crashing.
Older versions - tried also 28.x.x on different Windows 11 machine, still crashing
Crash diagnostics from Windows Event viewer:
Faulting application name: Media Center 29.exe, version: 29.0.62.0, time stamp: 0x62a8850c
Faulting module name: out_main.dll, version: 29.0.62.0, time stamp: 0x62a884d8
Exception code: 0xc000041d
Fault offset: 0x000000000001b49e
Faulting process id: 0x227c
Faulting application start time: 0x01d88940b58e2c61
Faulting application path: C:\Program Files\J River\Media Center 29\Media Center 29.exe
Faulting module path: C:\Program Files\J River\Media Center 29\Plugins\out_main.dll