Im trying to decrtypt a file from final password manager in linux that I used years ago
the code reads 
<KeyInfo cipher="AES-256" salt="31chars" vstring="64chars"/>

31 characters in the salt and 64 characters in the vstring

What hash should I use to decrypt this?
I tried sevral alternatives with 3200 and 500.

Any help would be apriciated. 

Im still new here.