Thunderbird 60.7 crashed when moving from one pc to another.

Thunderbird 60.7 crashed when moving from one pc to another.
Loading on to 2nd pc thunderbird did not show my 5 email accounts and I seem to have lost all my folders and all my current and saved email history. What it did request was to set up an initial email account - which I did - and this obviously modified my profile. Somewhere I found that if my address book was accessible then perhaps the rest (all that I have seemingly lost) could be still available. I have looked at my profile and there are some large files - might these be my history and lost files. Can I rescue these files. I am a relative novice in this area. Help please.