I moved Calibre library!!

Hi I moved calibre library to fix internal database conflicts while files are there but when i open location I dont see the usual opf file in folder. The books can be accessed fine though.Moved library by using

""I believe the simplest (most automatic) is to:
Create/Switch A (new) empty library (in a new location), tick use existing
structure
Switch back to the OLD library
Select all: Right-click: Copy to Library <new library> Delete after copy

What is leftover are your problem kids
s
You should be able to add thos in the traditional 'add book' manner""
Orig where it is not del and new library doesnt have opf files SHould I be concerned??TIA