Export Lastpass field data, which they are currently holding hostage. Requires the lastpass cli. Will include lots of noise; manual parsing will be needed.

lpass-fields-export.sh

#!/bin/bash

# Inspired by https://github.com/mindrunner/lastpass-attachment-exporter

filename="lastpass-fields-export.txt"

# Clear the file first
echo "" > $filename

echo -n "Checking accounts"

# List all accounts and parse their IDs
for id in `lpass ls | sed -E -n "s/^.*id:[[:space:]]*([0-9]*).*$/\1/p"`; do
  echo -n "."

  entry=`lpass show ${id}`

  # Get the extra fields by filtering out the most common fields
  extrafields=`echo "${entry}" | grep -viE "\[id:[[:space:]]|^password:|^username:|^url:|^Generated Pasword for|^email:|^remember:|user:|passwd:|login_email:|login_password:|rem:|email_address:"`

  # If there are any non-standard fields left
  if [ ! -z "$extrafields" ]; then
    # Output the password's information
    echo `echo "${entry}" | grep -iE "\[id: "` >> $filename
    # And the extra fields
    printf "%s\n\n" "${extrafields}" >> $filename
  fi

done

printf "\nDone! Results in %s\n" "$filename"

I wouldn't be surprised if they're actively making this harder, the whole company is pretty shady about exports