That would have been easy.

But see for yourself. Here is the code, directly pasted from my post

/^"((?:[^"\\]|\\.)*)"$/$1/

^"

matches your field's quotechar at the start of the field

(...)

will "remember" what was matched inside the quotes

(?:...)*

This will match anything in place of the ... and tells the parser that it may apear as often as possible. Even zero times

[^"\\]

will match any character but " and \

|

is an alternative. Either the left or the right part has to match

\\.

Will match any "escaped" character

"$

again your quotechar but now at the end