There's just one curve in that file, which was the last used curve.
Here's two versions of that curve, one for the Graphic EQ effect and one for the Filter Curve EQ effect:
To import the curve in either effect, click on the "Manage" button, then "Import", then select the appropriate TXT file.
Note that the imported curve is NOT automatically saved as a new preset. If you want to retain it you need to "Manage button > Save Preset" and give it a name.
Where are my own EQ curves saved?
Forum rules
This forum is for Audacity on macOS 10.4 and later.
Please state which version of macOS you are using,
and the exact three-section version number of Audacity from "Audacity menu > About Audacity".
Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade at https://www.audacityteam.org/download/.
The old forums for those versions are now closed, but you can still read the archives of the 1.2.x and 1.3.x forums.
Please state which version of macOS you are using,
and the exact three-section version number of Audacity from "Audacity menu > About Audacity".
Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade at https://www.audacityteam.org/download/.
The old forums for those versions are now closed, but you can still read the archives of the 1.2.x and 1.3.x forums.
Re: Where are my own EQ curves saved?
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)
Re: Where are my own EQ curves saved?
In the current version of Audacity, yes they do.
In Audacity 2.3.2 and earlier they went into the "EQCurves.xml" file.
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)