Can I upgrade Padloper in place?

[GeorgeP]

Hello, I have "inherited" the administration of this ProcessWire site, which includes an active Padloper store with several products. Looking at the modules page, I assume that this is probably a very old version (not sure if I should be looking somewhere else).

How can I upgrade to a more up-to-date/stable version, without having to rebuild the whole shop and inventory from scratch? When I click "check for updates", I get an error that "That module is not currently tracked by the modules directory".

Thank you for your help

George