@ANDREA-GAROFALO It depends. This old program consisted of two different applications. Audio Studio became Samplitude Music Studio and MIDI Studio was bought by Apple and is now Logic Pro. Samplitude Music Studio can edit WAV and MP3 files fine. There is a free version Samplitude Pro X4 Silver, which you can download from this link http://dl04.magix.net/2019/SamplitudeProX4Silver/Program/SamProX4_Silver_INT_200121_07-59.exe This should be enough to edit audio files. Copy the link text(!) into your internet browser if the download doesn't work.
@ANDREA-GAROFALO Yes, if you worked with Audio Studio back then to edit your audio files it is very similar. It's the same program just 10 years newer. Just try the free Samplitude Pro X4 Silver.