Muse is already a 20 year old Linux music sequencing program.
Someone didn’t do their due diligence.
The practical reality of naming things online in this age is that you try to avoid obvious collisions e.g. don't name your photo editing app Photochop, don't name your computer company Newton's Apple. But there's not a lot of risk of customer confusion between different domains like music sequencer vs thinking workspace.
Muse Something Something = ok. Just muse? There’s prior art and proof of it.