I have contacts on my iPhone and Macbook Catalina. I have a newer PC (Lenovo Yoga one year old) but was using Mail until this fall; then I stopped having access to Mail or Outlook when new Outlook became the only supported mail app on my PC . I cannot open Outlook because I did not pay for a 365 subscription. I installed Thunderbird, but the PC will not admit to having an address book or contacts any more. I do have contacts in iCloud, and can open iCloud Drive on my PC, but contacts are not accessible through iCloud Drive directly but through iCloud and only through Outlook which is nonfunctioning. I do have iCloud sharing on for my contacts. After trying to import into THunderbird unsuccessfuly, I tried also dragging contacts out of iCLoud onto my desktop. But that ended up with a png file with a random seeming name.

Even if there is no syncing I would like at least a one time transfer of my contacts to my PC, in a way that Thunderbird can use them. Any ideas - other than subscribing to365??