Inbox itself is ~2Gb, but  Inbox.msf file size is 0 

Hi There, After installing the new thunderbird release 15.12.2, i started getting alot of duplicates. i was messing around in the thunderbird layout etc There was a report about a damaged mailbox, but not the inbox. i think i was behind on compacting. Then i realized most of inbox was gone ! i tried the repair suggested in Thunderbird properties on the message summary index file .msf when i first noticed problem, i made copies both inbox and .msf currently: Inbox itself is ~2Gb, but Inbox.msf file size is 0 i have copy of the Inbox, but copy of Inbox.msf is gone... i reinstalled the latest thunderbird. but didn't help. ''I took the advice of @Toad-Hall and uninstalled the flatpak version of thunderbird, then installed the version available as an rpm via dnf/yum and that worked. Life is good''. i'm running windows on a bootcamped macbook pro, windows 10 home. did i install correct version ? any other ideas ? i have used thunderbird for many years and appreciate you'all for keeping it going ! thanks, Kathy