Theme restarted to raw version after swapping active theme to child for test, and back to parent

[prestaKar]

Hello, I'm first time working with PrestaShop in small company, and basically I broke correct Parent active theme.
I was trying do do stuff with AI, and followed suggestion of creating child_theme instead of modifying parent theme.
So I created files, with theme.yml etc. 
And set new child as active theme. It booted up, but all the modules were broken and didn't show anything at all.
So, as any other person I decided to swap back to previous theme that was set up with all pictures, text, translations in presta by me previously. 
To my suprise, the theme looked raw, like before i changed anything, comepletely not showing what i created.

I tried to bring back copy of FTP server from two days before, but it didn't fix anything at all.

[prestaKar]

Okay, if anyone seeks anwser to this post, basically fault was behind ap page builder, which stores information in database of domain, not in files of ftp.
Whenever this happens, use backup copy of FTP and then of Database.