When I mark the recorded audio signal, I go into effects then Filter curve EQ, Manage, Import, open window then in the EQBackup.xml file, the message appears: “is not a valid presets file”. In version 2.2.1 this did not happen !!
The “EQBackup.xml” file is left over from the old “Equalization” effect.
Filter Curve EQ uses a different format for presets.
There’s a tool included called “EQ XML to TXT Converter” (EQ XML to TXT Converter - Audacity Manual) which can convert the old style preset files into the new format.