If you goal is to just extract your BTC... you can simply export the private keys and then sweep (recommended) or import (not recommended) them into the wallet of your choice.
NOTE:
You DO NOT need to have Bitcoin Core installed or synced to be able to do this.- Wallet Properties -> Backup this wallet -> See other backup options -> Select "Export key lists" -> Click "Export keys lists" button
- Make sure you have selected the following options: "Address String", "Private key (Plain Base58)", "Include Unused (Address Pool)" and "Omit spaces in key data"
All your addresses and private keys (WIF formatted) will be displayed in the text box. You can copy/paste or save as required.