Outlook 2019 removed when importing data into Thunderbird

Dear Sir or Madam, I downloaded and installed Thunderbird. Then, I wanted to import my emails and email addresses from my Outlook 2019 (as part of Office 2019). The emails did transfer. Not sure if my email addresses (called contacts?) transferred. At the end of these transfers, I no longer had Office 2019. My taskbar icons for Word, Excel, and Outlook gone. The only "Outlook" I now had was the "Outlook app." Office 2019 gone. Apparently, it got replaced with Office 365. Not at all what I wanted. Did I so something wrong? Is this something to be expected? Thank you.