Reloading a database

[Mackiovello]

I'm trying to unload, modify, and reload the database. These are the step I'm taking, and it's not working:

Setup 

1. Download and install DB Browser for SQLite
2. Download and install PeaZip

Steps

1. Unload the database on the Logic Machine by going to "Utilities" and click "Backup". This will download a tar.gz file with all the required files.
2. Right-click on the downloaded file and choose `PeaZip -> Extract here`, this will create a tar file with the same name
3. Right-click on the tar file and choose `PeaZip -> Extract here`, that will extract all the files to the directory, such as `current.db` and the `icons` directory
4. Open DB Browser for SQLite
5. Click `Open Database` and choose the extracted `current.db` file
6. Change the data you want to change
7. Click `Write Changes` to persist the changes in the database
8. Go to `http://onlinemd5.com/`
9. Click `Choose File` and select `current.db`
10. Copy the file checksum
11. Open `current.md5` with Notepad or any other text editor
12. Change the existing checksum to the new checksum
13. Save and close `current.md5`
14. Select all the files that were extracted in step three, right-click, and choose `PeaZip -> Convert`
15. Select `GZip` as the output format and click `OK`
16. Go to the `Utilities` tab of the Logic Machine
17. Click `Restore` and select the tar.gz file created in step 15
18. See the message "Backup file is invalid"

Is there a step that's incorrect? What format should the file that you reload be in?