Help!!!

I have posted this in easy populate, but thought I would post here too as it is regaring re-instating my previous product data that has been overwritten!!

I have done something very silly!! I have uploaded an old txt file in error and now it has updated and added files going back to June.

I don't have any recent txt files and wondered if anyone knows how to restore what was in my previous backup if this is possible. I have no idea where to start.

I really hope someone knows the solution otherwise I will need to go through all of my items and check each one individually

Thank you!!