You'll have to have your presets installed, and your old applications installed i believe. Then you can use the preset updater. More info here:
https://www.arturia.com/faq/vc5presetupdater/preset-converter-general-questionsHowever - The preset converter used to be found here:
https://www.arturia.com/support/updates&manuals - but for some reason it's not there at the moment. There is something going on, on the websites at the moment, so perhaps it's a fault it's not there and will come again. But you can contact Arturia support through your account about it. I assume it's a fault the preset updater is gone from the download page.
I can't attach the updater here, as it's to big.
If your presets are so old, that they are protected by eLicenser, then you also need to have your eLicenser activated to decode them using the jupiter V2 decoder - on windows located in the hidden folder ProgramData - i believe.