How to delete many format strings?

Hello,

I have very many format strings and I want to delete many of them. Is there a config/ini file where I can delete the unwanted format strings? Deleting one by one in the ui is very time consuming?

Thank you
A.R.

There is no editable file for this data.

There are functions in the right-arrow-button that allow you to delete one or all.
So I would copy those strings that you want to keep to a plain text file and then delete all.
When the time comes, recycle the strings from the text file.