Thanks ida.topazlabs - I spoke too soon, I cannot start the program again (consistently, even with UAC turned off), and now one mystery is what was different once yesterday evening, when I was able to start it (just that once so far).
Further digging for clues and diagnostic info found a .dmp in the Topaz AppData folders, and opening that in WinDbg yields the following. (BTW, I am a recently-retired developer, and if you want me to assist debugging / diagnostics on this, I am totally willing to help.) It is an exception in tutils.dll, and although it didn’t look immediately like a missing DLL dependency (which is what my first guess would have been), searching on the exception code 0xe06d7363, I get hits that say it is a missing or damaged C++ redistributable. E.g., this link comes up first on Google 0xe06d7363 Error: Which fix to use? | Windows 11 Forum. Here is the dump info:
Microsoft (R) Windows Debugger Version 10.0.25921.1001 AMD64
Copyright (c) Microsoft Corporation. All rights reserved.
Loading Dump File [C:\Users\bugan\AppData\Local\Temp\Topaz Labs LLC\Topaz Video AI\Crashes\db\reports\bad5eec0-d0e8-4854-ac41-0b1d399cec74.dmp]
User Mini Dump File: Only registers, stack and portions of memory are available
************* Path validation summary **************
Response Time (ms) Location
Deferred srv*
Symbol search path is: srv*
Executable search path is:
Windows 10 Version 22621 (2070) MP (16 procs) Free x64
Product: WinNt
Edition build lab: Windows NT 10.0.22621.2070
Debug session time: Fri Aug 11 10:11:23.000 2023 (UTC - 7:00)
System Uptime: not available
Process Uptime: 0 days 0:00:02.000
…
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Loading unloaded module list
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This dump file has an exception of interest stored in it.
The stored exception information can be accessed via .ecxr.
(26f0.16e8): C++ EH exception - code e06d7363 (first/second chance not available)
For analysis of this file, run !analyze -v
*** WARNING: Unable to verify checksum for ntdll.dll
ntdll!NtDelayExecution+0x14:
00007ff9`2788f3d4 c3 ret
0:000> !analyze -v
*** WARNING: Check Image - Checksum mismatch - Dump: 0x0, File: 0x3b84f7 - C:\ProgramData\Dbg\sym\KERNELBASE.dll\C42B59FB3a4000\KERNELBASE.dll
*** WARNING: Unable to verify checksum for USER32.dll
*** WARNING: Unable to verify checksum for ole32.dll
*** WARNING: Unable to verify checksum for twinapi.appcore.dll
KEY_VALUES_STRING: 1
Key : Analysis.CPU.mSec
Value: 46
Key : Analysis.Elapsed.mSec
Value: 7343
Key : Analysis.IO.Other.Mb
Value: 29
Key : Analysis.IO.Read.Mb
Value: 34
Key : Analysis.IO.Write.Mb
Value: 90
Key : Analysis.Init.CPU.mSec
Value: 31
Key : Analysis.Init.Elapsed.mSec
Value: 85582
Key : Analysis.Memory.CommitPeak.Mb
Value: 124
Key : Failure.Bucket
Value: CPP_EXCEPTION_e06d7363_tutils.dll!Unknown
Key : Failure.Hash
Value: {7f8c82d4-456e-f55d-6633-77a47a83f368}
Key : Timeline.Process.Start.DeltaSec
Value: 2
Key : WER.Process.Version
Value: 3.3.10.0
FILE_IN_CAB: bad5eec0-d0e8-4854-ac41-0b1d399cec74.dmp
NTGLOBALFLAG: 0
PROCESS_BAM_CURRENT_THROTTLED: 0
PROCESS_BAM_PREVIOUS_THROTTLED: 0
CONTEXT: (.ecxr)
rax=00007ff9277f0000 rbx=00007ff8eb762f48 rcx=00007ff92784aa68
rdx=00007ff92797cbf8 rsi=000000f2c3b5d7e0 rdi=0000000019930520
rip=00007ff9250c4c3c rsp=000000f2c3b5d680 rbp=000000000000000f
r8=000000f2c3b5d4f8 r9=0000000000000000 r10=000000f2c3b5fc40
r11=0000000000000000 r12=0000000000000000 r13=000000f2c3b5f0a0
r14=000000f2c3b5da60 r15=000002dcfdd30620
iopl=0 nv up ei pl nz na pe nc
cs=0033 ss=0000 ds=0000 es=0000 fs=0053 gs=002b efl=00000202
KERNELBASE!RaiseException+0x6c:
00007ff9`250c4c3c 0f1f440000 nop dword ptr [rax+rax]
Resetting default scope
EXCEPTION_RECORD: (.exr -1)
ExceptionAddress: 00007ff9250c4c3c (KERNELBASE!RaiseException+0x000000000000006c)
ExceptionCode: e06d7363 (C++ EH exception)
ExceptionFlags: 00000081
NumberParameters: 4
Parameter[0]: 0000000019930520
Parameter[1]: 000000f2c3b5d7e0
Parameter[2]: 00007ff8eb762f48
Parameter[3]: 00007ff8eb6f0000
PROCESS_NAME: Topaz Video AI.exe
ERROR_CODE: (NTSTATUS) 0xe06d7363 -
EXCEPTION_CODE_STR: e06d7363
EXCEPTION_PARAMETER1: 0000000019930520
EXCEPTION_PARAMETER2: 000000f2c3b5d7e0
EXCEPTION_PARAMETER3: 00007ff8eb762f48
EXCEPTION_PARAMETER4: 7ff8eb6f0000
STACK_TEXT:
000000f2c3b5d680 00007ff9
0c746720 : 00002fd862efbb3a 00000000
00000000 0000000000000008 00007ff9
24c600b5 : KERNELBASE!RaiseException+0x6c
000000f2c3b5d760 00007ff8
eb73873f : 0000000000000000 00007ff8
c1d08380 00007ff8c1d083b7 00007ff8
c1d08380 : VCRUNTIME140!_CxxThrowException+0x90
000000f2c3b5d7c0 00007ff8
eb737201 : 00007ff8c1d083b7 00007ff8
c190b42b 000000f2c3b5d760 00000000
00000000 : tutils!qt_plugin_instance+0x45c1e
000000f2c3b5d810 00007ff8
eb6f99c5 : 000002dc875b53f0 00007ff8
c197c437 0000000000000038 00007ff8
00000000 : tutils!qt_plugin_instance+0x446e0
000000f2c3b5d840 00007ff8
eb6ff082 : 000002dcfecca640 00007ff8
c190e44d 000002dc80a76060 00000000
00000001 : tutils!qt_plugin_instance+0x6ea4
000000f2c3b5d870 00007ff8
eb702a35 : 000000f2c3b5da60 000002dc
fecca648 000000f2c3b5d939 00007ff8
d1b3eafa : tutils!qt_plugin_instance+0xc561
000000f2c3b5d8b0 00007ff8
eb6fcce1 : 0000000000000000 000000f2
c3b5dab8 000002dc875b53f0 000000f2
c3b5dab8 : tutils!qt_plugin_instance+0xff14
000000f2c3b5d9a0 00007ff8
eb6f6c70 : 000002dc875b53f0 000002dc
875b53f0 00007ff8eb6f1b63 000000f2
c3b5dab8 : tutils!qt_plugin_instance+0xa1c0
000000f2c3b5d9d0 00007ff8
d297e8e0 : 0000000000000000 00007ff9
2782d2c9 0000000000fc0175 00000000
000000e0 : tutils!qt_plugin_instance+0x414f
000000f2c3b5da00 00007ff8
d294a152 : 00000000ffffffff 000002dc
fd77ad88 000002dcff4efb10 000002dc
fa521ec0 : Qt6Qml!QQmlType::create+0x70
000000f2c3b5da30 00007ff8
d294fc68 : 00007ff8c1d08900 00007ff8
0000004e 0000000000000000 00007ff8
c1d08900 : Qt6Qml!QQmlObjectCreator::createInstance+0x212
000000f2c3b5deb0 00007ff8
d29530e9 : 0000000000000001 000000f2
c3b5e2f0 000000f2c3b5f0a0 00000000
00000001 : Qt6Qml!QQmlObjectCreator::setPropertyBinding+0x508
000000f2c3b5e1f0 00007ff8
d294e622 : 000002dc0000001e 000000f2
00000001 000000000000001c 000002dc
800f4780 : Qt6Qml!QQmlObjectCreator::setupBindings+0x839
000000f2c3b5e3a0 00007ff8
d294ac57 : 000000f2c3b5f0a0 000000f2
c3b5eac0 000002dcfd777ac0 00000000
00000000 : Qt6Qml!QQmlObjectCreator::populateInstance+0x19f2
000000f2c3b5e9c0 00007ff8
d2949d35 : 0000000000000000 00000000
00000000 0000000000000000 00007ff8
d294c901 : Qt6Qml!QQmlObjectCreator::createInstance+0xd17
000000f2c3b5ee40 00007ff8
d294a54d : 0000000000000000 00000000
ffffffff 0000000000000000 000002dc
05010004 : Qt6Qml!QQmlObjectCreator::create+0x205
000000f2c3b5eec0 00007ff8
d2949d35 : 0000000000000000 00000000
00000000 000002dcfcd114e8 000002dc
fcb14001 : Qt6Qml!QQmlObjectCreator::createInstance+0x60d
000000f2c3b5f340 00007ff8
d28f37e5 : 0000000000000000 000002dc
fcbadc60 0000000000000000 000000f2
c3b5f480 : Qt6Qml!QQmlObjectCreator::create+0x205
000000f2c3b5f3c0 00007ff8
d28f35c1 : 0000000000000000 000000f2
c3b5f529 000000f2c3b5f7a0 00007ff8
d28f6b8e : Qt6Qml!QQmlComponentPrivate::beginCreate+0x215
000000f2c3b5f450 00007ff8
d28f4651 : 0000000000000000 00000000
00000000 00007ff8d1dd2bb0 000002dc
fcb5b7f0 : Qt6Qml!QQmlComponent::beginCreate+0x31
000000f2c3b5f480 00007ff8
d28de1cf : 000002dcfcb5b7f0 000002dc
fcb04c00 000002dcfcbadc60 00000000
00000000 : Qt6Qml!QQmlComponent::create+0x101
000000f2c3b5f4d0 00007ff8
d28def9b : 00007ff800000001 000002dc
fcb5b7f0 0000000000000002 000002dc
fcbbd220 : Qt6Qml!QQmlApplicationEnginePrivate::finishLoad+0x14f
000000f2c3b5f590 00007ff8
d28de87d : 000002dcfcb990d0 000002dc
fcb04c00 000000f2c3b5f690 00007ff8
d1b3f000 : Qt6Qml!QQmlApplicationEnginePrivate::startLoad+0x2ab
000000f2c3b5f670 00007ff6
f8e721a2 : 000002dcfcb6c2a0 000000f2
c3b5f7c0 000000f200000007 00007ff8
d2a6c520 : Qt6Qml!QQmlApplicationEngine::load+0x2d
000000f2c3b5f6c0 00007ff6
f8e8e4a7 : 0000000000000000 00000000
00000000 0000000000000000 000002dc
fa6e6430 : Topaz_Video_AI+0x21a2
000000f2c3b5fac0 00007ff6
f8e8b96e : 0000000000000000 00000000
00000000 0000000000000000 00000000
00000000 : Topaz_Video_AI+0x1e4a7
000000f2c3b5fb50 00007ff9
273626ad : 0000000000000000 00000000
00000000 0000000000000000 00000000
00000000 : Topaz_Video_AI+0x1b96e
000000f2c3b5fb90 00007ff9
2784aa68 : 0000000000000000 00000000
00000000 0000000000000000 00000000
00000000 : KERNEL32!BaseThreadInitThunk+0x1d
000000f2c3b5fbc0 00000000
00000000 : 0000000000000000 00000000
00000000 0000000000000000 00000000
00000000 : ntdll!RtlUserThreadStart+0x28
STACK_COMMAND: ~0s; .ecxr ; kb
SYMBOL_NAME: tutils+45c1e
MODULE_NAME: tutils
IMAGE_NAME: tutils.dll
FAILURE_BUCKET_ID: CPP_EXCEPTION_e06d7363_tutils.dll!Unknown
OSPLATFORM_TYPE: x64
OSNAME: Windows 10
FAILURE_ID_HASH: {7f8c82d4-456e-f55d-6633-77a47a83f368}
Followup: MachineOwner