WINDOWS - How to extract ChatStorage.sqlite
First of all make sure to have a recent unencrypted iTunes backup, like explained here.
Then you can use any iTunes extractor to obtain the required ChatStorage.sqlite, like the free ones provided below:
- WazzapMigrator Extractor - free one-click extractor for both messages and medias
- iPhone Backup Extractor - free until 4 files extracted (enough to download ChatStorage.sqlite)
- iBackup Viewer - free