In backend you will find a component to see FTP root and subdirectories.

You made a mistake.
You should override the folders.
But you have renamed the org folders and insert the update! Thats not working.
1.) Restore the org folder
2.) Backup the org folders to your harddrive
3.) Override the org folders with update folders
4.) Press compile less

If you want to backup the old folders, please zip the template and download the zip file to your harddisk.

rtied it but same result.
Is there a way to download a "full updated" warp version?

I receive this error "compiling less"
The uploaded file exceeds the upload_max_filesize directive in php.ini.

OK, I've fixe upload_max_filesize in PHP cpnfig and recompile LESS... but no results.
Search box in not working.

It is an error in your Joomla file:

../components/com_search/views/search/view.html.php

Maybe something went wrong while updating to Joomla 3.4.5

You can copy the org Joomla files from here to your Joomla installation:
github.com/joomla/joomla-cms/tree/staging/components/com_search

Just replaced all "com_search" dir (and subdir) and no effect.