I tried to do this with tech support as well.
It would have saved time and work, if you had mentioned, that you was told to uninstall by Arturia support.
Please provide better informations in generel, if you wan't help.
About your issues:
Just in case - If you have created presets yourself, then export all of them first, so you have them after the reinstall.
Am I to delete yhe voc and b3 presets?
Delete the whole concerned Analog Lab folder - (delete the product folder). Not just delete a few instruments but the whole concerned Analog Lab (product) folder. Everything will be reinstalled,
except what you have created yourself.
It look like you have enabled Windows to show hidden folders like the ProgramData folder. That's needed.
When I type in the path a message comes up that I need a new app to access it.
This i don't understand.
How do I find the 64-bit file to uninstall.
Yes i see this is confusing as this product as far as i know only is located at C:\Program Files (x86)\Arturia\<concerned product>.
So just run the uninstaller in that location.
And after the above is done, then restart your PC (
just in case) before you run your product installer again. Hopefully that will fix your issue.