Support /Targetdir option on installer

We use Rez https://github.com/AcademySoftwareFoundation/rez to manage almost all our software, particularly project critical software like an editor. To achieve this we need to install the application to a network location.
The dotnetinstaller that is used to install resolve does have a /TARGETDIR option, but it does not seem to be supported?

I have actually managed to examine the contents of the installer, extract stuff and get Resolve to install to a directory of my choosing, but I don't think it was designed to work this way as it requires special consideration to get it to run. E.g. if you do not have a

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C:\ProgramData\Blackmagic Design\DaVinci Resolve\

already populated from a normally installed version then Resolve.exe will just sit there and do nothing when invoked.
Also, on startup I am asked to Optimize DaVinci Neural Engines. If I click Optimize then Resolve promptly crashes.

I note that the Linux installer does have this option, as the .run script has a

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--directory

command line option.

Also inherent in this request is the ability to have more than a single version installed.