BEFORE you installing newest theme version, you need to remove the current "Extra Plugin" in your plugins page or repository in wp-content.
Please make sure you have a Backup.
Then do this:
- Go to admin panel > Plugins > Remove current Current Extra plugin (e.g: Mandala Extra, if you use mandala theme)
- Then Update your theme to the newest version: PLEASE READ THIS ONE
- Install new Extra Plugin as TGM will ask you to install it once the newest theme activated