I used Audacity for awhile, and it worked okay, but I wanted something better (Audacity is lacking in many features and capabilities). I tried the Ableton Lite that came with my Zoom U-44, but it’s very complicated to learn, plus many of the features are only available if you buy the (very expensive) full version. I finally settled on Reaper, which is what I’ve been using for about a year now. It’s free to try for a period of time, easy enough to learn, and then very inexpensive to purchase the lifetime license. I highly recommend Reaper.
P.S. There’s also a Reaper Thread here in the forum.