FSUIPC crash when iniBuilds L1011 loaded

When I load the iniBuilds L-1011, FSUIPC crashes. It seems not to do it when I load a variant for the first time, but yes on subsequent ones. I am able to set a profile on the first load and fly it fine, on subsequent load/exit and reopen FSUIPC it crashes.

In the log, the last entry is something like "InputEvent found: 'INSTRUMENT_V_C_BREAKER_844_IE_ID' with hash=1724658712408629451 [type=0]" (always InputEvent, but seemingly not always the same one)

In EventViewer, following Application Error is saved:

Faulting application name: FSUIPC7.exe, version: 7.5.0.7, time stamp: 0x69fb172c
Faulting module name: FSUIPC7.exe, version: 7.5.0.7, time stamp: 0x69fb172c
Exception code: 0xc0000005
Fault offset: 0x00000000000a70a4
Faulting process id: 0x4ac8
Faulting application start time: 0x01dd0e5f8317b636
Faulting application path: C:\FSUIPC7\FSUIPC7.exe
Faulting module path: C:\FSUIPC7\FSUIPC7.exe
Report Id: 7e01e0a1-9655-4c1f-a970-526d0724756f
Faulting package full name:
Faulting package-relative application ID: