I recently bought and installed V Collection 7. When checking out the V3 instruments, they now have no presets at all and the instruments load with default ones only.
I appear to have a Presets folder in the ProgramData\Arturia folder with all the requisite contents. For instance, the CS-80 V3\Factory folder has 510 presets in it. None of them show up in the browser, though. Same deal with the ARP-2600 V3. There are 519 presets in its folder, none of which show in the browser.
I have tried uninstalling and re-installing the instruments - no change.