Issue installing 6.0.0.420

As the title says, I'm attempting to install 6.0.0.420. I get a UAC prompt, and then the installer silently fails. If I check Event Viewer, I see what appears to be a generic access violation error:

Faulting application name: ToadDataPoint_pro_6.0.0.420.exe, version: 6.0.0.420, time stamp: 0x370d108f
Faulting module name: ToadDataPoint_pro_6.0.0.420.exe, version: 6.0.0.420, time stamp: 0x370d108f
Exception code: 0xc0000005
Fault offset: 0x000010d4
Faulting process id: 0x94bc
Faulting application start time: 0x01d8b0c1a4ec836b
Faulting application path: C:\Users\xxx\Downloads\ToadDataPoint_pro_6.0.0.420.exe
Faulting module path: C:\Users\xxx\Downloads\ToadDataPoint_pro_6.0.0.420.exe
Report Id: 1e6143c4-c1c5-45e3-9b7c-89c2811c00ad
Faulting package full name: 
Faulting package-relative application ID: 

The installer for 5.6 runs without issue. The machine is running Windows 10, but I have also tried on a laptop running Windows 11 with the same issue. Antivirus does not appear to be blocking anything.

Unfortunately, the TDP version you tried to install (6.0.0.420) has been identified as buggy and removed from our support portal for download.

I strongly recommend installing TDP 6.0.5, and here's why: https://support.quest.com/toad-data-point/kb/4368599/why-toad-data-point-6-0-0-was-removed-from-the-portal

If you face the same issue as before, you can submit a Quest ticket at: https://support.quest.com/create-service-request