I need to access my old email profile inbox and such from thunderbird, but i no longer have the active email account

hi everyone, i had thunderbird setup and configed, i have the /profile folder in /my documents, etc.. however the email host went out of business, etc.. so i just mostly converted to outlook and another primary email, BUT i still used thunderbird to access my old email folders and messages ,etc... (i just didnt sync to get any new mail...) so i just reinstalled a fresh windows 10, installed thunderbird, but its not letting me get past the 'setup an email account' i just was to create a thunderbird account that access my old /profiles foldewr to see ,my old messages and folders. how would i do this?