Trouble with Nextgen Gallery Update

Hi,

Once upon a time in WordPress, a princess updated a plugin named nextgen gallery from 2.40 version to 2.58.
And then, her site was completely up and down.

She tried desperately to downgrade to a previous version via ftp, but the magic failed.
No more images, broken galleries and diaporamas.
It became worse and worse. Thank you Photocrati ! No access to WP admin …

So, she asked her host for a Premium account to get more help….
She was dreaming… Her host (Hostinger) destroyed her database and files backups (previous the destroying nextgen update) while transferring her corrupted site.

Hopefully, she had kept with her another file backup, but no database. So, she restored the web site with Filezilla, hoping that the postdated database won’t create any conflict.

Now, she’s facing no WP Admin access and a web site totally messed up, without images. She noticed that her sleeping host is changing the IP adress every three days. Is that the only reason for this mess up ?

Between the older version of the public_html file and her database post version, there are 4 plugin’s updates : Nextgen gallery, SEO WordPress, Maxbutton and another one (?). Do these modifications affect the database ?

Is there any charming knight ready to save the princess from plugins monsters and hosting disasters, with some knowledge and tricks ?
Thank you so much for her…