Yes, it worked, thank you

VERSION=3
format=bytevalue
database=main
type=btree
db_pagesize=8192
HEADER=END
...some hexadecimal lines...
DATA=END
no errors. What should I do next?

Did you try deleting the __db.00x files?
If pywallet still won't work after deleting those then I don't know what's happening
What you can try is downloading an old Bitcoin-Qt/bitcoin-core release like 0.8, 0.9 or 0.10 from what I can see here:
https://en.bitcoin.it/wiki/Bitcoin_Core