Looks like it has something to do with auto import. I manually initiated it and shortly afterwards jriver crashed:
0264235: 4624: Playback: 0x1210 DisplayTypeEx: wBitsPerSample 16
0264235: 4624: Playback: 0x1210 DisplayTypeEx: cbSize 0
0264235: 4624: Playback: 0x1210 DumpGraph: Finish (0 ms)
0264235: 4624: Playback: CMJPlayerCore::Play: Play succeeded
0264235: 4624: Playback: CMJPlayerCore::Play: Result: 1
0264235: 4624: Playback: CMJPlayerCore::Play: Finish (0 ms)
0264235: 4624: Playback: CDXWaveFeeder::OnGraphNotify: Start: Thread: 0x1210, Graph: 0x2724f8
0264235: 4624: Playback: CDXWaveFeeder::OnGraphNotify: Event 13 param1 0, Param2 0
0264235: 4624: Playback: CDXWaveFeeder::OnGraphNotify: Event 34816 param1 0, Param2 -1868223061
0264235: 4624: Playback: 0x1210 DisplayTypeEx: Audio out MediaType M type MEDIATYPE_Audio S type MEDIASUBTYPE_PCM
0264235: 4624: Playback: 0x1210 DisplayTypeEx: Subtype description UNKNOWN
0264235: 4624: Playback: 0x1210 DisplayTypeEx: Not temporally compressed
0264235: 4624: Playback: 0x1210 DisplayTypeEx: Sample size 4
0264235: 4624: Playback: 0x1210 DisplayTypeEx: Format type FORMAT_WaveFormatEx
0264235: 4624: Playback: 0x1210 DisplayTypeEx: Subtype MEDIASUBTYPE_PCM
0264235: 4624: Playback: 0x1210 DisplayTypeEx: wFormatTag 1
0264235: 4624: Playback: 0x1210 DisplayTypeEx: nChannels 2
0264235: 4624: Playback: 0x1210 DisplayTypeEx: nSamplesPerSec 44100
0264235: 4624: Playback: 0x1210 DisplayTypeEx: nAvgBytesPerSec 176400
0264235: 4624: Playback: 0x1210 DisplayTypeEx: nBlockAlign 4
0264235: 4624: Playback: 0x1210 DisplayTypeEx: wBitsPerSample 16
0264235: 4624: Playback: 0x1210 DisplayTypeEx: cbSize 0
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: Start
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: Using settings format
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: wFormatTag 1
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nChannels 2
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nSamplesPerSec 44100
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nAvgBytesPerSec 176400
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nBlockAlign 4
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: wBitsPerSample 16
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: cbSize 0
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: Finish (0 ms)
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: Start
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: Using settings format
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: wFormatTag 1
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nChannels 2
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nSamplesPerSec 44100
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nAvgBytesPerSec 176400
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nBlockAlign 4
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: wBitsPerSample 16
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: cbSize 0
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: Finish (0 ms)
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: Start
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: Using settings format
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: wFormatTag 1
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nChannels 2
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nSamplesPerSec 44100
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nAvgBytesPerSec 176400
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: nBlockAlign 4
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: wBitsPerSample 16
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: cbSize 0
0264235: 4624: Playback: CAutoConfigureAudioOutput::GetOutputFormat: Finish (0 ms)
0264235: 4624: Playback: CDXWaveFeeder::OnGraphNotify: End: Thread: 0x1210, Graph: 0x2724f8, 0ms
0264235: 4624: Playback: CDXWaveFeeder::OnGraphNotify: Start: Thread: 0x1210, Graph: 0x2724f8
0264235: 4624: Playback: CDXWaveFeeder::OnGraphNotify: End: Thread: 0x1210, Graph: 0x2724f8, 0ms
0264235: 1236: Playback: CWaveOutBinPlayThread::Thread: Start
0265592: 5044: General: TopLevelExceptionFilter: Unhandled exception -- program crashing
0265592: 5044: General: TopLevelExceptionFilter: Message: 0, wParam: 0, lParam: 0, Window class: